25312224251 has 16 divisors (see below), whose sum is σ = 27613939200. Its totient is φ = 23110502688.

The previous prime is 25312224233. The next prime is 25312224281. The reversal of 25312224251 is 15242221352.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25312224251 is a prime.

It is a super-2 number, since 2×25312224251² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (25312224221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259406 + ... + 343388.

It is an arithmetic number, because the mean of its divisors is an integer number (1725871200).

Almost surely, 2^25312224251 is an apocalyptic number.

25312224251 is a deficient number, since it is larger than the sum of its proper divisors (2301714949).

25312224251 is a wasteful number, since it uses less digits than its factorization.

25312224251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84578.

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

The spelling of 25312224251 in words is "twenty-five billion, three hundred twelve million, two hundred twenty-four thousand, two hundred fifty-one".