25231402102 has 4 divisors (see below), whose sum is σ = 37847103156. Its totient is φ = 12615701050.

The previous prime is 25231402087. The next prime is 25231402103. The reversal of 25231402102 is 20120413252.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231402103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307850524 + ... + 6307850527.

It is an arithmetic number, because the mean of its divisors is an integer number (9461775789).

Almost surely, 2^25231402102 is an apocalyptic number.

25231402102 is a deficient number, since it is larger than the sum of its proper divisors (12615701054).

25231402102 is a wasteful number, since it uses less digits than its factorization.

25231402102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12615701053.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 25231402102 its reverse (20120413252), we get a palindrome (45351815354).

The spelling of 25231402102 in words is "twenty-five billion, two hundred thirty-one million, four hundred two thousand, one hundred two".