54581999 has 2 divisors, whose sum is σ = 54582000. Its totient is φ = 54581998.

The previous prime is 54581987. The next prime is 54582023. The reversal of 54581999 is 99918545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54581999 - 2¹² = 54577903 is a prime.

It is a super-2 number, since 2×54581999² = 5958389229672002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54581909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27290999 + 27291000.

It is an arithmetic number, because the mean of its divisors is an integer number (27291000).

Almost surely, 2^54581999 is an apocalyptic number.

54581999 is a deficient number, since it is larger than the sum of its proper divisors (1).

54581999 is an equidigital number, since it uses as much as digits as its factorization.

54581999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 50.

The square root of 54581999 is about 7387.9631157715. The cubic root of 54581999 is about 379.3293781283.

The spelling of 54581999 in words is "fifty-four million, five hundred eighty-one thousand, nine hundred ninety-nine".