155891313 has 12 divisors (see below), whose sum is σ = 225358848. Its totient is φ = 103843320.

The previous prime is 155891293. The next prime is 155891353. The reversal of 155891313 is 313198551.

155891313 is a `hidden beast` number, since 1 + 558 + 91 + 3 + 13 = 666.

155891313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155891313 - 2¹² = 155887217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155891353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5968 + ... + 18638.

It is an arithmetic number, because the mean of its divisors is an integer number (18779904).

Almost surely, 2^155891313 is an apocalyptic number.

It is an amenable number.

155891313 is a deficient number, since it is larger than the sum of its proper divisors (69467535).

155891313 is a wasteful number, since it uses less digits than its factorization.

155891313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14044 (or 14041 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 155891313 is about 12485.6442765281. The cubic root of 155891313 is about 538.1962139522.

The spelling of 155891313 in words is "one hundred fifty-five million, eight hundred ninety-one thousand, three hundred thirteen".