54236521 has 2 divisors, whose sum is σ = 54236522. Its totient is φ = 54236520.

The previous prime is 54236513. The next prime is 54236531. The reversal of 54236521 is 12563245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33177600 + 21058921 = 5760^2 + 4589^2 .

It is a cyclic number.

It is not a de Polignac number, because 54236521 - 2³ = 54236513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54236521.

It is not a weakly prime, because it can be changed into another prime (54236531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27118260 + 27118261.

It is an arithmetic number, because the mean of its divisors is an integer number (27118261).

Almost surely, 2^54236521 is an apocalyptic number.

It is an amenable number.

54236521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54236521 is an equidigital number, since it uses as much as digits as its factorization.

54236521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 54236521 is about 7364.5448603427. The cubic root of 54236521 is about 378.5273589752.

Adding to 54236521 its reverse (12563245), we get a palindrome (66799766).

The spelling of 54236521 in words is "fifty-four million, two hundred thirty-six thousand, five hundred twenty-one".