54018521 has 2 divisors, whose sum is σ = 54018522. Its totient is φ = 54018520.

The previous prime is 54018451. The next prime is 54018533. The reversal of 54018521 is 12581045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46240000 + 7778521 = 6800^2 + 2789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54018521 is a prime.

It is a super-2 number, since 2×54018521² = 5836001222054882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Lucas number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54018221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27009260 + 27009261.

It is an arithmetic number, because the mean of its divisors is an integer number (27009261).

Almost surely, 2^54018521 is an apocalyptic number.

It is an amenable number.

54018521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54018521 is an equidigital number, since it uses as much as digits as its factorization.

54018521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 54018521 is about 7349.7293147435. The cubic root of 54018521 is about 378.0195229878.

Adding to 54018521 its reverse (12581045), we get a palindrome (66599566).

The spelling of 54018521 in words is "fifty-four million, eighteen thousand, five hundred twenty-one".