2155614591 has 32 divisors (see below), whose sum is σ = 3168535552. Its totient is φ = 1295481600.

The previous prime is 2155614589. The next prime is 2155614623. The reversal of 2155614591 is 1954165512.

It is not a de Polignac number, because 2155614591 - 2¹ = 2155614589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155614511) 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, 289566 + ... + 296916.

It is an arithmetic number, because the mean of its divisors is an integer number (99016736).

Almost surely, 2^2155614591 is an apocalyptic number.

2155614591 is a deficient number, since it is larger than the sum of its proper divisors (1012920961).

2155614591 is a wasteful number, since it uses less digits than its factorization.

2155614591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543.

The product of its digits is 54000, while the sum is 39.

The square root of 2155614591 is about 46428.5966942788. The cubic root of 2155614591 is about 1291.7853993350.

The spelling of 2155614591 in words is "two billion, one hundred fifty-five million, six hundred fourteen thousand, five hundred ninety-one".