13573700731 has 4 divisors (see below), whose sum is σ = 13575077464. Its totient is φ = 13572324000.

The previous prime is 13573700717. The next prime is 13573700743. The reversal of 13573700731 is 13700737531.

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 13573700731 - 2²¹ = 13571603579 is a prime.

It is a super-2 number, since 2×13573700731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13573760731) 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, 673470 + ... + 693331.

It is an arithmetic number, because the mean of its divisors is an integer number (3393769366).

Almost surely, 2^13573700731 is an apocalyptic number.

13573700731 is a deficient number, since it is larger than the sum of its proper divisors (1376733).

13573700731 is an equidigital number, since it uses as much as digits as its factorization.

13573700731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376732.

The product of its (nonzero) digits is 46305, while the sum is 37.

The spelling of 13573700731 in words is "thirteen billion, five hundred seventy-three million, seven hundred thousand, seven hundred thirty-one".