31561054 has 32 divisors (see below), whose sum is σ = 56010240. Its totient is φ = 13057632.

The previous prime is 31561043. The next prime is 31561067. The reversal of 31561054 is 45016513.

It is a super-2 number, since 2×31561054² = 1992200259181832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61752 + ... + 62260.

It is an arithmetic number, because the mean of its divisors is an integer number (1750320).

Almost surely, 2^31561054 is an apocalyptic number.

31561054 is a deficient number, since it is larger than the sum of its proper divisors (24449186).

31561054 is a wasteful number, since it uses less digits than its factorization.

31561054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 31561054 is about 5617.9225697761. The cubic root of 31561054 is about 316.0218900074.

Adding to 31561054 its reverse (45016513), we get a palindrome (76577567).

The spelling of 31561054 in words is "thirty-one million, five hundred sixty-one thousand, fifty-four".