31813053 has 4 divisors (see below), whose sum is σ = 42417408. Its totient is φ = 21208700.

The previous prime is 31813039. The next prime is 31813057. The reversal of 31813053 is 35031813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35031813 = 3 ⋅11677271.

It is a cyclic number.

It is not a de Polignac number, because 31813053 - 2⁵ = 31813021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31813057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5302173 + ... + 5302178.

It is an arithmetic number, because the mean of its divisors is an integer number (10604352).

Almost surely, 2^31813053 is an apocalyptic number.

It is an amenable number.

31813053 is a deficient number, since it is larger than the sum of its proper divisors (10604355).

31813053 is a wasteful number, since it uses less digits than its factorization.

31813053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10604354.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 31813053 is about 5640.3061087143. The cubic root of 31813053 is about 316.8607527955.

Adding to 31813053 its reverse (35031813), we get a palindrome (66844866).

The spelling of 31813053 in words is "thirty-one million, eight hundred thirteen thousand, fifty-three".