25211534551 has 16 divisors (see below), whose sum is σ = 29887162624. Its totient is φ = 20818171584.

The previous prime is 25211534527. The next prime is 25211534561. The reversal of 25211534551 is 15543511252.

It is not a de Polignac number, because 25211534551 - 2⁹ = 25211534039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25211534561) 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, 551721 + ... + 595666.

It is an arithmetic number, because the mean of its divisors is an integer number (1867947664).

Almost surely, 2^25211534551 is an apocalyptic number.

25211534551 is a deficient number, since it is larger than the sum of its proper divisors (4675628073).

25211534551 is a wasteful number, since it uses less digits than its factorization.

25211534551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147510.

The product of its digits is 30000, while the sum is 34.

The spelling of 25211534551 in words is "twenty-five billion, two hundred eleven million, five hundred thirty-four thousand, five hundred fifty-one".