25215813102 has 32 divisors (see below), whose sum is σ = 53167374720. Its totient is φ = 7950670560.

The previous prime is 25215813101. The next prime is 25215813143. The reversal of 25215813102 is 20131851252.

It is a self number, because there is not a number n which added to its sum of digits gives 25215813102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215813101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94924 + ... + 243807.

It is an arithmetic number, because the mean of its divisors is an integer number (1661480460).

Almost surely, 2^25215813102 is an apocalyptic number.

25215813102 is an abundant number, since it is smaller than the sum of its proper divisors (27951561618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25215813102 is a wasteful number, since it uses less digits than its factorization.

25215813102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339408.

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 25215813102 in words is "twenty-five billion, two hundred fifteen million, eight hundred thirteen thousand, one hundred two".