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2145131101 = 15491384849
BaseRepresentation
bin111111111011100…
…0001101001011101
312112111102221200001
41333313001221131
513343123143401
6552505334301
7104105212351
oct17767015135
95474387601
102145131101
11a00963823
124ba497391
13282560059
14164c77461
15c84ce601
hex7fdc1a5d

2145131101 has 4 divisors (see below), whose sum is σ = 2146517500. Its totient is φ = 2143744704.

The previous prime is 2145131083. The next prime is 2145131143. The reversal of 2145131101 is 1011315412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1222551225 + 922579876 = 34965^2 + 30374^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145131101 - 213 = 2145122909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145161101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690876 + ... + 693973.

It is an arithmetic number, because the mean of its divisors is an integer number (536629375).

Almost surely, 22145131101 is an apocalyptic number.

It is an amenable number.

2145131101 is a deficient number, since it is larger than the sum of its proper divisors (1386399).

2145131101 is a wasteful number, since it uses less digits than its factorization.

2145131101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386398.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 2145131101 is about 46315.5600311602. The cubic root of 2145131101 is about 1289.6878641069.

Adding to 2145131101 its reverse (1011315412), we get a palindrome (3156446513).

It can be divided in two parts, 214 and 5131101, that added together give a palindrome (5131315).

The spelling of 2145131101 in words is "two billion, one hundred forty-five million, one hundred thirty-one thousand, one hundred one".

Divisors: 1 1549 1384849 2145131101