54506581 has 2 divisors, whose sum is σ = 54506582. Its totient is φ = 54506580.

The previous prime is 54506561. The next prime is 54506593. The reversal of 54506581 is 18560545.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48080356 + 6426225 = 6934^2 + 2535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54506581 is a prime.

It is a super-2 number, since 2×54506581² = 5941934744619122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54506561) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27253290 + 27253291.

It is an arithmetic number, because the mean of its divisors is an integer number (27253291).

Almost surely, 2^54506581 is an apocalyptic number.

It is an amenable number.

54506581 is a deficient number, since it is larger than the sum of its proper divisors (1).

54506581 is an equidigital number, since it uses as much as digits as its factorization.

54506581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 54506581 is about 7382.8572382242. The cubic root of 54506581 is about 379.1545863773.

The spelling of 54506581 in words is "fifty-four million, five hundred six thousand, five hundred eighty-one".