25120022231 has 4 divisors (see below), whose sum is σ = 25251540864. Its totient is φ = 24988503600.

The previous prime is 25120022183. The next prime is 25120022261. The reversal of 25120022231 is 13222002152.

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-25120022231 is a prime.

It is a super-2 number, since 2×25120022231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120022261) 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, 65759030 + ... + 65759411.

It is an arithmetic number, because the mean of its divisors is an integer number (6312885216).

Almost surely, 2^25120022231 is an apocalyptic number.

25120022231 is a deficient number, since it is larger than the sum of its proper divisors (131518633).

25120022231 is a wasteful number, since it uses less digits than its factorization.

25120022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131518632.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 25120022231 its reverse (13222002152), we get a palindrome (38342024383).

The spelling of 25120022231 in words is "twenty-five billion, one hundred twenty million, twenty-two thousand, two hundred thirty-one".