156155091 has 32 divisors (see below), whose sum is σ = 229785600. Its totient is φ = 93947040.

The previous prime is 156155071. The next prime is 156155099. The reversal of 156155091 is 190551651.

It is not a de Polignac number, because 156155091 - 2¹³ = 156146899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156155099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117730 + ... + 119048.

It is an arithmetic number, because the mean of its divisors is an integer number (7180800).

Almost surely, 2^156155091 is an apocalyptic number.

156155091 is a deficient number, since it is larger than the sum of its proper divisors (73630509).

156155091 is a wasteful number, since it uses less digits than its factorization.

156155091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 6750, while the sum is 33.

The square root of 156155091 is about 12496.2030633309. The cubic root of 156155091 is about 538.4995969578.

It can be divided in two parts, 15615 and 5091, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 156155091 in words is "one hundred fifty-six million, one hundred fifty-five thousand, ninety-one".