2145100453 has 4 divisors (see below), whose sum is σ = 2145329548. Its totient is φ = 2144871360.

The previous prime is 2145100423. The next prime is 2145100469. The reversal of 2145100453 is 3540015412.

It is a happy number.

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 1715864929 + 429235524 = 41423^2 + 20718^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145100453 - 2⁵ = 2145100421 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 (2145100423) 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, 99876 + ... + 119437.

It is an arithmetic number, because the mean of its divisors is an integer number (536332387).

Almost surely, 2^2145100453 is an apocalyptic number.

It is an amenable number.

2145100453 is a deficient number, since it is larger than the sum of its proper divisors (229095).

2145100453 is an equidigital number, since it uses as much as digits as its factorization.

2145100453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229094.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2145100453 is about 46315.2291692484. The cubic root of 2145100453 is about 1289.6817220515.

Adding to 2145100453 its reverse (3540015412), we get a palindrome (5685115865).

The spelling of 2145100453 in words is "two billion, one hundred forty-five million, one hundred thousand, four hundred fifty-three".