25701531 has 16 divisors (see below), whose sum is σ = 34909056. Its totient is φ = 16817216.

The previous prime is 25701497. The next prime is 25701539. The reversal of 25701531 is 13510752.

It is a cyclic number.

It is not a de Polignac number, because 25701531 - 2⁹ = 25701019 is a prime.

It is a super-2 number, since 2×25701531² = 1321137391487922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25701539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57796 + ... + 58238.

It is an arithmetic number, because the mean of its divisors is an integer number (2181816).

Almost surely, 2^25701531 is an apocalyptic number.

25701531 is a deficient number, since it is larger than the sum of its proper divisors (9207525).

25701531 is a wasteful number, since it uses less digits than its factorization.

25701531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 25701531 is about 5069.6677405921. The cubic root of 25701531 is about 295.1116344710. Note that the first 3 decimals are identical.

The spelling of 25701531 in words is "twenty-five million, seven hundred one thousand, five hundred thirty-one".