155292891 has 8 divisors (see below), whose sum is σ = 222984720. Its totient is φ = 95564832.

The previous prime is 155292887. The next prime is 155292899. The reversal of 155292891 is 198292551.

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

It is not a de Polignac number, because 155292891 - 2² = 155292887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155292899) 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 7 ways as a sum of consecutive naturals, for example, 1990896 + ... + 1990973.

It is an arithmetic number, because the mean of its divisors is an integer number (27873090).

Almost surely, 2^155292891 is an apocalyptic number.

155292891 is a deficient number, since it is larger than the sum of its proper divisors (67691829).

155292891 is a wasteful number, since it uses less digits than its factorization.

155292891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981885.

The product of its digits is 64800, while the sum is 42.

The square root of 155292891 is about 12461.6568320589. The cubic root of 155292891 is about 537.5066706221.

The spelling of 155292891 in words is "one hundred fifty-five million, two hundred ninety-two thousand, eight hundred ninety-one".