25154122231 has 16 divisors (see below), whose sum is σ = 28920673600. Its totient is φ = 21430967040.

The previous prime is 25154122229. The next prime is 25154122261. The reversal of 25154122231 is 13222145152.

It is a happy number.

It is not a de Polignac number, because 25154122231 - 2¹ = 25154122229 is a prime.

It is a super-2 number, since 2×25154122231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25154122231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25154122261) 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, 3616345 + ... + 3623293.

It is an arithmetic number, because the mean of its divisors is an integer number (1807542100).

Almost surely, 2^25154122231 is an apocalyptic number.

25154122231 is a deficient number, since it is larger than the sum of its proper divisors (3766551369).

25154122231 is a wasteful number, since it uses less digits than its factorization.

25154122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9994.

The product of its digits is 4800, while the sum is 28.

Adding to 25154122231 its reverse (13222145152), we get a palindrome (38376267383).

The spelling of 25154122231 in words is "twenty-five billion, one hundred fifty-four million, one hundred twenty-two thousand, two hundred thirty-one".