2153210051 has 4 divisors (see below), whose sum is σ = 2153642400. Its totient is φ = 2152777704.

The previous prime is 2153210039. The next prime is 2153210053. The reversal of 2153210051 is 1500123512.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2153210051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153210053) 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, 208616 + ... + 218693.

It is an arithmetic number, because the mean of its divisors is an integer number (538410600).

Almost surely, 2^2153210051 is an apocalyptic number.

2153210051 is a deficient number, since it is larger than the sum of its proper divisors (432349).

2153210051 is an equidigital number, since it uses as much as digits as its factorization.

2153210051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432348.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2153210051 is about 46402.6944368536. The cubic root of 2153210051 is about 1291.3049013616.

Adding to 2153210051 its reverse (1500123512), we get a palindrome (3653333563).

The spelling of 2153210051 in words is "two billion, one hundred fifty-three million, two hundred ten thousand, fifty-one".