155165379 has 4 divisors (see below), whose sum is σ = 206887176. Its totient is φ = 103443584.

The previous prime is 155165357. The next prime is 155165393. The reversal of 155165379 is 973561551.

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 155165379 - 2⁵ = 155165347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155165379.

It is not an unprimeable number, because it can be changed into a prime (155166379) 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, 25860894 + ... + 25860899.

It is an arithmetic number, because the mean of its divisors is an integer number (51721794).

Almost surely, 2^155165379 is an apocalyptic number.

155165379 is a deficient number, since it is larger than the sum of its proper divisors (51721797).

155165379 is an equidigital number, since it uses as much as digits as its factorization.

155165379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51721796.

The product of its digits is 141750, while the sum is 42.

The square root of 155165379 is about 12456.5396077723. The cubic root of 155165379 is about 537.3595135997.

The spelling of 155165379 in words is "one hundred fifty-five million, one hundred sixty-five thousand, three hundred seventy-nine".