25513031552 has 16 divisors (see below), whose sum is σ = 50826742800. Its totient is φ = 12756515712.

The previous prime is 25513031521. The next prime is 25513031569.

25513031552 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99660152 + ... + 99660407.

It is an arithmetic number, because the mean of its divisors is an integer number (3176671425).

Almost surely, 2^25513031552 is an apocalyptic number.

It is an amenable number.

25513031552 is a deficient number, since it is larger than the sum of its proper divisors (25313711248).

25513031552 is an equidigital number, since it uses as much as digits as its factorization.

25513031552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199320573 (or 199320561 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

It can be divided in two parts, 255130 and 31552, that added together give a palindrome (286682).

The spelling of 25513031552 in words is "twenty-five billion, five hundred thirteen million, thirty-one thousand, five hundred fifty-two".