25120125431 has 4 divisors (see below), whose sum is σ = 25220205864. Its totient is φ = 25020045000.

The previous prime is 25120125427. The next prime is 25120125451. The reversal of 25120125431 is 13452102152.

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

It is a cyclic number.

It is not a de Polignac number, because 25120125431 - 2² = 25120125427 is a prime.

It is a super-2 number, since 2×25120125431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25120125431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120125451) 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, 50039840 + ... + 50040341.

It is an arithmetic number, because the mean of its divisors is an integer number (6305051466).

Almost surely, 2^25120125431 is an apocalyptic number.

25120125431 is a deficient number, since it is larger than the sum of its proper divisors (100080433).

25120125431 is a wasteful number, since it uses less digits than its factorization.

25120125431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100080432.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 25120125431 its reverse (13452102152), we get a palindrome (38572227583).

The spelling of 25120125431 in words is "twenty-five billion, one hundred twenty million, one hundred twenty-five thousand, four hundred thirty-one".