31520066623 has 4 divisors (see below), whose sum is σ = 31750140240. Its totient is φ = 31289993008.

The previous prime is 31520066593. The next prime is 31520066653. The reversal of 31520066623 is 32666002513.

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

It is an interprime number because it is at equal distance from previous prime (31520066593) and next prime (31520066653).

It is a cyclic number.

It is not a de Polignac number, because 31520066623 - 2¹³ = 31520058431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31520066653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115036603 + ... + 115036876.

It is an arithmetic number, because the mean of its divisors is an integer number (7937535060).

Almost surely, 2^31520066623 is an apocalyptic number.

31520066623 is a deficient number, since it is larger than the sum of its proper divisors (230073617).

31520066623 is a wasteful number, since it uses less digits than its factorization.

31520066623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230073616.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 31520066623 in words is "thirty-one billion, five hundred twenty million, sixty-six thousand, six hundred twenty-three".