155259091 has 8 divisors (see below), whose sum is σ = 169943984. Its totient is φ = 140965920.

The previous prime is 155259061. The next prime is 155259103. The reversal of 155259091 is 190952551.

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

It is a cyclic number.

It is not a de Polignac number, because 155259091 - 2⁵ = 155259059 is a prime.

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 155259091.

It is not an unprimeable number, because it can be changed into a prime (155259061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97101 + ... + 98686.

It is an arithmetic number, because the mean of its divisors is an integer number (21242998).

Almost surely, 2^155259091 is an apocalyptic number.

155259091 is a deficient number, since it is larger than the sum of its proper divisors (14684893).

155259091 is a wasteful number, since it uses less digits than its factorization.

155259091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195861.

The product of its (nonzero) digits is 20250, while the sum is 37.

The square root of 155259091 is about 12460.3005983002. The cubic root of 155259091 is about 537.4676711041.

The spelling of 155259091 in words is "one hundred fifty-five million, two hundred fifty-nine thousand, ninety-one".