155161331 has 8 divisors (see below), whose sum is σ = 167314224. Its totient is φ = 143039520.

The previous prime is 155161291. The next prime is 155161399. The reversal of 155161331 is 133161551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-155161331 is a prime.

It is a super-2 number, since 2×155161331² = 48150077275383122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155161331.

It is not an unprimeable number, because it can be changed into a prime (155161631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185 + ... + 17901.

It is an arithmetic number, because the mean of its divisors is an integer number (20914278).

Almost surely, 2^155161331 is an apocalyptic number.

155161331 is a deficient number, since it is larger than the sum of its proper divisors (12152893).

155161331 is a wasteful number, since it uses less digits than its factorization.

155161331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15541.

The product of its digits is 1350, while the sum is 26.

The square root of 155161331 is about 12456.3771217798. The cubic root of 155161331 is about 537.3548406281.

The spelling of 155161331 in words is "one hundred fifty-five million, one hundred sixty-one thousand, three hundred thirty-one".