31664055 has 16 divisors (see below), whose sum is σ = 51619680. Its totient is φ = 16568448.

The previous prime is 31664053. The next prime is 31664071. The reversal of 31664055 is 55046613.

It is not a de Polignac number, because 31664055 - 2¹ = 31664053 is a prime.

It is a super-2 number, since 2×31664055² = 2005224758086050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31664053) 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, 19120 + ... + 20709.

It is an arithmetic number, because the mean of its divisors is an integer number (3226230).

Almost surely, 2^31664055 is an apocalyptic number.

31664055 is a deficient number, since it is larger than the sum of its proper divisors (19955625).

31664055 is a wasteful number, since it uses less digits than its factorization.

31664055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39890.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 31664055 is about 5627.0822812538. The cubic root of 31664055 is about 316.3653008521.

The spelling of 31664055 in words is "thirty-one million, six hundred sixty-four thousand, fifty-five".