25061631 has 16 divisors (see below), whose sum is σ = 38333184. Its totient is φ = 14266944.

The previous prime is 25061593. The next prime is 25061639. The reversal of 25061631 is 13616052.

It is not a de Polignac number, because 25061631 - 2⁶ = 25061567 is a prime.

It is a super-2 number, since 2×25061631² = 1256170696760322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25061639) 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, 3835 + ... + 8051.

It is an arithmetic number, because the mean of its divisors is an integer number (2395824).

Almost surely, 2^25061631 is an apocalyptic number.

25061631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25061631 is a deficient number, since it is larger than the sum of its proper divisors (13271553).

25061631 is a wasteful number, since it uses less digits than its factorization.

25061631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 25061631 is about 5006.1593062946. The cubic root of 25061631 is about 292.6418568248.

Adding to 25061631 its reverse (13616052), we get a palindrome (38677683).

The spelling of 25061631 in words is "twenty-five million, sixty-one thousand, six hundred thirty-one".