54791521 has 2 divisors, whose sum is σ = 54791522. Its totient is φ = 54791520.

The previous prime is 54791501. The next prime is 54791549. The reversal of 54791521 is 12519745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44957025 + 9834496 = 6705^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 54791521 - 2¹⁷ = 54660449 is a prime.

It is a super-2 number, since 2×54791521² = 6004221546986882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54791501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27395760 + 27395761.

It is an arithmetic number, because the mean of its divisors is an integer number (27395761).

Almost surely, 2^54791521 is an apocalyptic number.

It is an amenable number.

54791521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54791521 is an equidigital number, since it uses as much as digits as its factorization.

54791521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 54791521 is about 7402.1294908965. The cubic root of 54791521 is about 379.8141311694.

The spelling of 54791521 in words is "fifty-four million, seven hundred ninety-one thousand, five hundred twenty-one".