2155905151 has 4 divisors (see below), whose sum is σ = 2171415400. Its totient is φ = 2140394904.

The previous prime is 2155905119. The next prime is 2155905179. The reversal of 2155905151 is 1515095512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155905151 - 2⁵ = 2155905119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155705151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7754916 + ... + 7755193.

It is an arithmetic number, because the mean of its divisors is an integer number (542853850).

Almost surely, 2^2155905151 is an apocalyptic number.

2155905151 is a deficient number, since it is larger than the sum of its proper divisors (15510249).

2155905151 is a wasteful number, since it uses less digits than its factorization.

2155905151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15510248.

The product of its (nonzero) digits is 11250, while the sum is 34.

The square root of 2155905151 is about 46431.7256948307. The cubic root of 2155905151 is about 1291.8434375861.

The spelling of 2155905151 in words is "two billion, one hundred fifty-five million, nine hundred five thousand, one hundred fifty-one".