55591151 has 12 divisors (see below), whose sum is σ = 69834576. Its totient is φ = 43317120.

The previous prime is 55591097. The next prime is 55591171. The reversal of 55591151 is 15119555.

It is not a de Polignac number, because 55591151 - 2⁶ = 55591087 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55591171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31970 + ... + 33663.

It is an arithmetic number, because the mean of its divisors is an integer number (5819548).

Almost surely, 2^55591151 is an apocalyptic number.

55591151 is a deficient number, since it is larger than the sum of its proper divisors (14243425).

55591151 is a wasteful number, since it uses less digits than its factorization.

55591151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65662 (or 65651 counting only the distinct ones).

The product of its digits is 5625, while the sum is 32.

The square root of 55591151 is about 7455.9473576468. The cubic root of 55591151 is about 381.6528900104.

The spelling of 55591151 in words is "fifty-five million, five hundred ninety-one thousand, one hundred fifty-one".