54625721 has 2 divisors, whose sum is σ = 54625722. Its totient is φ = 54625720.

The previous prime is 54625717. The next prime is 54625723. The reversal of 54625721 is 12752645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35581225 + 19044496 = 5965^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 54625721 - 2² = 54625717 is a prime.

Together with 54625723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54625723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27312860 + 27312861.

It is an arithmetic number, because the mean of its divisors is an integer number (27312861).

Almost surely, 2^54625721 is an apocalyptic number.

It is an amenable number.

54625721 is a deficient number, since it is larger than the sum of its proper divisors (1).

54625721 is an equidigital number, since it uses as much as digits as its factorization.

54625721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 54625721 is about 7390.9215257639. The cubic root of 54625721 is about 379.4306362534.

The spelling of 54625721 in words is "fifty-four million, six hundred twenty-five thousand, seven hundred twenty-one".