25408228531 has 16 divisors (see below), whose sum is σ = 29752954560. Its totient is φ = 21242488320.

The previous prime is 25408228511. The next prime is 25408228541. The reversal of 25408228531 is 13582280452.

It is a cyclic number.

It is not a de Polignac number, because 25408228531 - 2⁵ = 25408228499 is a prime.

It is a super-2 number, since 2×25408228531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25408228511) 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, 1878565 + ... + 1892041.

It is an arithmetic number, because the mean of its divisors is an integer number (1859559660).

Almost surely, 2^25408228531 is an apocalyptic number.

25408228531 is a deficient number, since it is larger than the sum of its proper divisors (4344726029).

25408228531 is a wasteful number, since it uses less digits than its factorization.

25408228531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094.

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 25408228531 in words is "twenty-five billion, four hundred eight million, two hundred twenty-eight thousand, five hundred thirty-one".