31900054 has 16 divisors (see below), whose sum is σ = 49996800. Its totient is φ = 15247080.

The previous prime is 31900019. The next prime is 31900067. The reversal of 31900054 is 45000913.

It is a super-2 number, since 2×31900054² = 2035226890405832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31899998 and 31900034.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047 + ... + 8245.

It is an arithmetic number, because the mean of its divisors is an integer number (3124800).

Almost surely, 2^31900054 is an apocalyptic number.

31900054 is a deficient number, since it is larger than the sum of its proper divisors (18096746).

31900054 is a wasteful number, since it uses less digits than its factorization.

31900054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 31900054 is about 5648.0132790212. The cubic root of 31900054 is about 317.1493357093.

Adding to 31900054 its reverse (45000913), we get a palindrome (76900967).

The spelling of 31900054 in words is "thirty-one million, nine hundred thousand, fifty-four".