25550534131 has 4 divisors (see below), whose sum is σ = 25565364952. Its totient is φ = 25535703312.

The previous prime is 25550534083. The next prime is 25550534137. The reversal of 25550534131 is 13143505552.

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

It is a cyclic number.

It is not a de Polignac number, because 25550534131 - 2¹⁹ = 25550009843 is a prime.

It is a super-2 number, since 2×25550534131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25550534137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7412826 + ... + 7416271.

It is an arithmetic number, because the mean of its divisors is an integer number (6391341238).

Almost surely, 2^25550534131 is an apocalyptic number.

25550534131 is a deficient number, since it is larger than the sum of its proper divisors (14830821).

25550534131 is a wasteful number, since it uses less digits than its factorization.

25550534131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14830820.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 25550534131 in words is "twenty-five billion, five hundred fifty million, five hundred thirty-four thousand, one hundred thirty-one".