251240042153 has 8 divisors (see below), whose sum is σ = 269765614080. Its totient is φ = 233130775360.

The previous prime is 251240042113. The next prime is 251240042161. The reversal of 251240042153 is 351240042152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 251240042153 - 2²⁴ = 251223264937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251240042113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104075033 + ... + 104077446.

It is an arithmetic number, because the mean of its divisors is an integer number (33720701760).

Almost surely, 2^251240042153 is an apocalyptic number.

It is an amenable number.

251240042153 is a deficient number, since it is larger than the sum of its proper divisors (18525571927).

251240042153 is a wasteful number, since it uses less digits than its factorization.

251240042153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208152567.

The product of its (nonzero) digits is 9600, while the sum is 29.

Subtracting 251240042153 from its reverse (351240042152), we obtain a palindrome (99999999999).

The spelling of 251240042153 in words is "two hundred fifty-one billion, two hundred forty million, forty-two thousand, one hundred fifty-three".