31201690623 has 4 divisors (see below), whose sum is σ = 41602254168. Its totient is φ = 20801127080.

The previous prime is 31201690609. The next prime is 31201690627. The reversal of 31201690623 is 32609610213.

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

It is a cyclic number.

It is not a de Polignac number, because 31201690623 - 2⁴ = 31201690607 is a prime.

It is a super-2 number, since 2×31201690623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201690627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5200281768 + ... + 5200281773.

It is an arithmetic number, because the mean of its divisors is an integer number (10400563542).

Almost surely, 2^31201690623 is an apocalyptic number.

31201690623 is a deficient number, since it is larger than the sum of its proper divisors (10400563545).

31201690623 is a wasteful number, since it uses less digits than its factorization.

31201690623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400563544.

The product of its (nonzero) digits is 11664, while the sum is 33.

The spelling of 31201690623 in words is "thirty-one billion, two hundred one million, six hundred ninety thousand, six hundred twenty-three".