2151241040 has 40 divisors (see below), whose sum is σ = 5386379208. Its totient is φ = 794304000.

The previous prime is 2151241039. The next prime is 2151241049. The reversal of 2151241040 is 401421512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101687056 + 2049553984 = 10084^2 + 45272^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151241049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033211 + ... + 1035290.

Almost surely, 2^2151241040 is an apocalyptic number.

2151241040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151241040 is an abundant number, since it is smaller than the sum of its proper divisors (3235138168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151241040 is a wasteful number, since it uses less digits than its factorization.

2151241040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068527 (or 2068521 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2151241040 is about 46381.4730253363. The cubic root of 2151241040 is about 1290.9111684517.

Adding to 2151241040 its reverse (401421512), we get a palindrome (2552662552).

The spelling of 2151241040 in words is "two billion, one hundred fifty-one million, two hundred forty-one thousand, forty".