54045042521 has 2 divisors, whose sum is σ = 54045042522. Its totient is φ = 54045042520.

The previous prime is 54045042517. The next prime is 54045042547. The reversal of 54045042521 is 12524054045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45969504025 + 8075538496 = 214405^2 + 89864^2 .

It is a cyclic number.

It is not a de Polignac number, because 54045042521 - 2² = 54045042517 is a prime.

It is not a weakly prime, because it can be changed into another prime (54045042421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27022521260 + 27022521261.

It is an arithmetic number, because the mean of its divisors is an integer number (27022521261).

Almost surely, 2^54045042521 is an apocalyptic number.

It is an amenable number.

54045042521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54045042521 is an equidigital number, since it uses as much as digits as its factorization.

54045042521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 54045042521 its reverse (12524054045), we get a palindrome (66569096566).

The spelling of 54045042521 in words is "fifty-four billion, forty-five million, forty-two thousand, five hundred twenty-one".