54690521 has 2 divisors, whose sum is σ = 54690522. Its totient is φ = 54690520.

The previous prime is 54690499. The next prime is 54690529. The reversal of 54690521 is 12509645.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30680521 + 24010000 = 5539^2 + 4900^2 .

It is a cyclic number.

It is not a de Polignac number, because 54690521 - 2⁶ = 54690457 is a prime.

It is not a weakly prime, because it can be changed into another prime (54690529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27345260 + 27345261.

It is an arithmetic number, because the mean of its divisors is an integer number (27345261).

Almost surely, 2^54690521 is an apocalyptic number.

It is an amenable number.

54690521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54690521 is an equidigital number, since it uses as much as digits as its factorization.

54690521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 54690521 is about 7395.3039829340. The cubic root of 54690521 is about 379.5806107160.

The spelling of 54690521 in words is "fifty-four million, six hundred ninety thousand, five hundred twenty-one".