25051223520 has 72 divisors (see below), whose sum is σ = 85487305176. Its totient is φ = 6680325888.

The previous prime is 25051223501. The next prime is 25051223557. The reversal of 25051223520 is 2532215052.

25051223520 is a `hidden beast` number, since 2 + 505 + 122 + 35 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8696902 + ... + 8699781.

It is an arithmetic number, because the mean of its divisors is an integer number (1187323683).

Almost surely, 2^25051223520 is an apocalyptic number.

25051223520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25051223520 is an abundant number, since it is smaller than the sum of its proper divisors (60436081656).

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

25051223520 is a wasteful number, since it uses less digits than its factorization.

25051223520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17396704 (or 17396693 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 25051223520 its reverse (2532215052), we get a palindrome (27583438572).

The spelling of 25051223520 in words is "twenty-five billion, fifty-one million, two hundred twenty-three thousand, five hundred twenty".