56735621 has 2 divisors, whose sum is σ = 56735622. Its totient is φ = 56735620.

The previous prime is 56735537. The next prime is 56735633. The reversal of 56735621 is 12653765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 5827396 = 7135^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 56735621 - 2¹⁰ = 56734597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56735221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28367810 + 28367811.

It is an arithmetic number, because the mean of its divisors is an integer number (28367811).

Almost surely, 2^56735621 is an apocalyptic number.

It is an amenable number.

56735621 is a deficient number, since it is larger than the sum of its proper divisors (1).

56735621 is an equidigital number, since it uses as much as digits as its factorization.

56735621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 35.

The square root of 56735621 is about 7532.3051584492. The cubic root of 56735621 is about 384.2541832905.

The spelling of 56735621 in words is "fifty-six million, seven hundred thirty-five thousand, six hundred twenty-one".