1373155531317 has 8 divisors (see below), whose sum is σ = 2034304490880. Its totient is φ = 915437020860.

The previous prime is 1373155531313. The next prime is 1373155531333. The reversal of 1373155531317 is 7131355513731.

1373155531317 is a `hidden beast` number, since 1 + 3 + 7 + 31 + 55 + 531 + 31 + 7 = 666.

It is not a de Polignac number, because 1373155531317 - 2² = 1373155531313 is a prime.

It is a super-2 number, since 2×1373155531317² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373155531313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25428806109 + ... + 25428806162.

It is an arithmetic number, because the mean of its divisors is an integer number (254288061360).

Almost surely, 2^{1373155531317} is an apocalyptic number.

It is an amenable number.

1373155531317 is a deficient number, since it is larger than the sum of its proper divisors (661148959563).

1373155531317 is an equidigital number, since it uses as much as digits as its factorization.

1373155531317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50857612280 (or 50857612274 counting only the distinct ones).

The product of its digits is 496125, while the sum is 45.

The spelling of 1373155531317 in words is "one trillion, three hundred seventy-three billion, one hundred fifty-five million, five hundred thirty-one thousand, three hundred seventeen".