55167591 has 16 divisors (see below), whose sum is σ = 75610080. Its totient is φ = 35758080.

The previous prime is 55167589. The next prime is 55167611. The reversal of 55167591 is 19576155.

It is not a de Polignac number, because 55167591 - 2¹ = 55167589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55167491) 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, 47271 + ... + 48423.

It is an arithmetic number, because the mean of its divisors is an integer number (4725630).

Almost surely, 2^55167591 is an apocalyptic number.

55167591 is a deficient number, since it is larger than the sum of its proper divisors (20442489).

55167591 is a wasteful number, since it uses less digits than its factorization.

55167591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586.

The product of its digits is 47250, while the sum is 39.

The square root of 55167591 is about 7427.4888757911. The cubic root of 55167591 is about 380.6811214402.

The spelling of 55167591 in words is "fifty-five million, one hundred sixty-seven thousand, five hundred ninety-one".