155055331 has 8 divisors (see below), whose sum is σ = 155973600. Its totient is φ = 154140480.

The previous prime is 155055319. The next prime is 155055337. The reversal of 155055331 is 133550551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155055331 is a prime.

It is a super-2 number, since 2×155055331² = 48084311343039122, 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 155055331.

It is not an unprimeable number, because it can be changed into a prime (155055337) 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, 186625 + ... + 187453.

It is an arithmetic number, because the mean of its divisors is an integer number (19496700).

Almost surely, 2^155055331 is an apocalyptic number.

155055331 is a deficient number, since it is larger than the sum of its proper divisors (918269).

155055331 is an equidigital number, since it uses as much as digits as its factorization.

155055331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 155055331 is about 12452.1215461463. The cubic root of 155055331 is about 537.2324463252.

The spelling of 155055331 in words is "one hundred fifty-five million, fifty-five thousand, three hundred thirty-one".