31372730573 has 4 divisors (see below), whose sum is σ = 31373778720. Its totient is φ = 31371682428.

The previous prime is 31372730567. The next prime is 31372730581. The reversal of 31372730573 is 37503727313.

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.

It is a cyclic number.

It is not a de Polignac number, because 31372730573 - 2¹⁴ = 31372714189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31372730573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31372730533) 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, 477815 + ... + 539492.

It is an arithmetic number, because the mean of its divisors is an integer number (7843444680).

Almost surely, 2^31372730573 is an apocalyptic number.

It is an amenable number.

31372730573 is a deficient number, since it is larger than the sum of its proper divisors (1048147).

31372730573 is a wasteful number, since it uses less digits than its factorization.

31372730573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048146.

The product of its (nonzero) digits is 277830, while the sum is 41.

The spelling of 31372730573 in words is "thirty-one billion, three hundred seventy-two million, seven hundred thirty thousand, five hundred seventy-three".