54311581 has 2 divisors, whose sum is σ = 54311582. Its totient is φ = 54311580.

The previous prime is 54311567. The next prime is 54311599. The reversal of 54311581 is 18511345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27994681 + 26316900 = 5291^2 + 5130^2 .

It is a cyclic number.

It is not a de Polignac number, because 54311581 - 2¹⁷ = 54180509 is a prime.

It is a super-2 number, since 2×54311581² = 5899495661439122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54311281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27155790 + 27155791.

It is an arithmetic number, because the mean of its divisors is an integer number (27155791).

Almost surely, 2^54311581 is an apocalyptic number.

It is an amenable number.

54311581 is a deficient number, since it is larger than the sum of its proper divisors (1).

54311581 is an equidigital number, since it uses as much as digits as its factorization.

54311581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 28.

The square root of 54311581 is about 7369.6391363485. The cubic root of 54311581 is about 378.7018979892.

The spelling of 54311581 in words is "fifty-four million, three hundred eleven thousand, five hundred eighty-one".