25532031 has 16 divisors (see below), whose sum is σ = 39207168. Its totient is φ = 14476800.

The previous prime is 25532027. The next prime is 25532033. The reversal of 25532031 is 13023552.

It is not a de Polignac number, because 25532031 - 2² = 25532027 is a prime.

It is a super-2 number, since 2×25532031² = 1303769213969922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 25531989 and 25532007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532033) 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, 1890 + ... + 7391.

It is an arithmetic number, because the mean of its divisors is an integer number (2450448).

Almost surely, 2^25532031 is an apocalyptic number.

25532031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25532031 is a deficient number, since it is larger than the sum of its proper divisors (13675137).

25532031 is a wasteful number, since it uses less digits than its factorization.

25532031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9422.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 25532031 is about 5052.9230154436. The cubic root of 25532031 is about 294.4614554417.

Adding to 25532031 its reverse (13023552), we get a palindrome (38555583).

The spelling of 25532031 in words is "twenty-five million, five hundred thirty-two thousand, thirty-one".