54123581 has 2 divisors, whose sum is σ = 54123582. Its totient is φ = 54123580.

The previous prime is 54123557. The next prime is 54123593. The reversal of 54123581 is 18532145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 27556 = 7355^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 54123581 - 2¹⁴ = 54107197 is a prime.

It is a super-2 number, since 2×54123581² = 5858724040527122, 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 (54123521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27061790 + 27061791.

It is an arithmetic number, because the mean of its divisors is an integer number (27061791).

Almost surely, 2^54123581 is an apocalyptic number.

It is an amenable number.

54123581 is a deficient number, since it is larger than the sum of its proper divisors (1).

54123581 is an equidigital number, since it uses as much as digits as its factorization.

54123581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 54123581 is about 7356.8730449832. The cubic root of 54123581 is about 378.2644328892.

The spelling of 54123581 in words is "fifty-four million, one hundred twenty-three thousand, five hundred eighty-one".