25553031 has 16 divisors (see below), whose sum is σ = 40281600. Its totient is φ = 14097888.

The previous prime is 25553027. The next prime is 25553071. The reversal of 25553031 is 13035552.

It is not a de Polignac number, because 25553031 - 2² = 25553027 is a prime.

It is a super-2 number, since 2×25553031² = 1305914786573922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25552992 and 25553010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25553071) 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, 20371 + ... + 21588.

It is an arithmetic number, because the mean of its divisors is an integer number (2517600).

Almost surely, 2^25553031 is an apocalyptic number.

25553031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25553031 is a deficient number, since it is larger than the sum of its proper divisors (14728569).

25553031 is a wasteful number, since it uses less digits than its factorization.

25553031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41998.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 25553031 is about 5055.0005934718. Note that the first 3 decimals coincide. The cubic root of 25553031 is about 294.5421644667.

Adding to 25553031 its reverse (13035552), we get a palindrome (38588583).

The spelling of 25553031 in words is "twenty-five million, five hundred fifty-three thousand, thirty-one".