73131313 has 4 divisors (see below), whose sum is σ = 73289728. Its totient is φ = 72972900.

The previous prime is 73131293. The next prime is 73131319. The reversal of 73131313 is 31313137.

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 73131313 - 2¹⁷ = 73000241 is a prime.

It is a super-2 number, since 2×73131313² = 10696377882207938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73131319) 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, 78513 + ... + 79438.

It is an arithmetic number, because the mean of its divisors is an integer number (18322432).

Almost surely, 2^73131313 is an apocalyptic number.

It is an amenable number.

73131313 is a deficient number, since it is larger than the sum of its proper divisors (158415).

73131313 is a wasteful number, since it uses less digits than its factorization.

73131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158414.

The product of its digits is 567, while the sum is 22.

The square root of 73131313 is about 8551.6848047622. The cubic root of 73131313 is about 418.1843638543.

The spelling of 73131313 in words is "seventy-three million, one hundred thirty-one thousand, three hundred thirteen".