155159091 has 16 divisors (see below), whose sum is σ = 233017120. Its totient is φ = 102021120.

The previous prime is 155159089. The next prime is 155159099. The reversal of 155159091 is 190951551.

155159091 is a `hidden beast` number, since 15 + 51 + 590 + 9 + 1 = 666.

It is not a de Polignac number, because 155159091 - 2¹ = 155159089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155159099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37390 + ... + 41331.

It is an arithmetic number, because the mean of its divisors is an integer number (14563570).

Almost surely, 2^155159091 is an apocalyptic number.

155159091 is a deficient number, since it is larger than the sum of its proper divisors (77858029).

155159091 is an equidigital number, since it uses as much as digits as its factorization.

155159091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78803 (or 78797 counting only the distinct ones).

The product of its (nonzero) digits is 10125, while the sum is 36.

The square root of 155159091 is about 12456.2872076715. The cubic root of 155159091 is about 537.3522547591.

The spelling of 155159091 in words is "one hundred fifty-five million, one hundred fifty-nine thousand, ninety-one".