54166591 has 2 divisors, whose sum is σ = 54166592. Its totient is φ = 54166590.

The previous prime is 54166571. The next prime is 54166601. The reversal of 54166591 is 19566145.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54166591 - 2¹¹ = 54164543 is a prime.

It is a super-2 number, since 2×54166591² = 5868039161122562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 54166591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54166571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27083295 + 27083296.

It is an arithmetic number, because the mean of its divisors is an integer number (27083296).

Almost surely, 2^54166591 is an apocalyptic number.

54166591 is a deficient number, since it is larger than the sum of its proper divisors (1).

54166591 is an equidigital number, since it uses as much as digits as its factorization.

54166591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 54166591 is about 7359.7955814003. The cubic root of 54166591 is about 378.3646039260.

The spelling of 54166591 in words is "fifty-four million, one hundred sixty-six thousand, five hundred ninety-one".