54156591 has 6 divisors (see below), whose sum is σ = 78226200. Its totient is φ = 36104388.

The previous prime is 54156581. The next prime is 54156617. The reversal of 54156591 is 19565145.

54156591 is a `hidden beast` number, since 5 + 4 + 1 + 565 + 91 = 666.

It is not a de Polignac number, because 54156591 - 2⁷ = 54156463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54156521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3008691 + ... + 3008708.

It is an arithmetic number, because the mean of its divisors is an integer number (13037700).

Almost surely, 2^54156591 is an apocalyptic number.

54156591 is a deficient number, since it is larger than the sum of its proper divisors (24069609).

54156591 is a wasteful number, since it uses less digits than its factorization.

54156591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017405 (or 6017402 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 54156591 is about 7359.1161833470. The cubic root of 54156591 is about 378.3413184848.

The spelling of 54156591 in words is "fifty-four million, one hundred fifty-six thousand, five hundred ninety-one".