155813113 has 4 divisors (see below), whose sum is σ = 155911680. Its totient is φ = 155714548.

The previous prime is 155813087. The next prime is 155813191. The reversal of 155813113 is 311318551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 311318551 = 2473 ⋅125887.

It is a cyclic number.

It is not a de Polignac number, because 155813113 - 2²⁵ = 122258681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155843113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46873 + ... + 50086.

It is an arithmetic number, because the mean of its divisors is an integer number (38977920).

Almost surely, 2^155813113 is an apocalyptic number.

It is an amenable number.

155813113 is a deficient number, since it is larger than the sum of its proper divisors (98567).

155813113 is an equidigital number, since it uses as much as digits as its factorization.

155813113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98566.

The product of its digits is 1800, while the sum is 28.

The square root of 155813113 is about 12482.5122871960. The cubic root of 155813113 is about 538.1062068345.

The spelling of 155813113 in words is "one hundred fifty-five million, eight hundred thirteen thousand, one hundred thirteen".