31638063 has 4 divisors (see below), whose sum is σ = 42184088. Its totient is φ = 21092040.

The previous prime is 31638053. The next prime is 31638083. The reversal of 31638063 is 36083613.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31638063 - 2⁵ = 31638031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31638063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31638053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5273008 + ... + 5273013.

It is an arithmetic number, because the mean of its divisors is an integer number (10546022).

Almost surely, 2^31638063 is an apocalyptic number.

31638063 is a deficient number, since it is larger than the sum of its proper divisors (10546025).

31638063 is a wasteful number, since it uses less digits than its factorization.

31638063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10546024.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 31638063 is about 5624.7722620565. The cubic root of 31638063 is about 316.2787124696.

The spelling of 31638063 in words is "thirty-one million, six hundred thirty-eight thousand, sixty-three".