56933281 has 2 divisors, whose sum is σ = 56933282. Its totient is φ = 56933280.

The previous prime is 56933251. The next prime is 56933287. The reversal of 56933281 is 18233965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50126400 + 6806881 = 7080^2 + 2609^2 .

It is a cyclic number.

It is not a de Polignac number, because 56933281 - 2⁵ = 56933249 is a prime.

It is a super-2 number, since 2×56933281² = 6482796970849922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56933281.

It is not a weakly prime, because it can be changed into another prime (56933287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28466640 + 28466641.

It is an arithmetic number, because the mean of its divisors is an integer number (28466641).

Almost surely, 2^56933281 is an apocalyptic number.

It is an amenable number.

56933281 is a deficient number, since it is larger than the sum of its proper divisors (1).

56933281 is an equidigital number, since it uses as much as digits as its factorization.

56933281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 56933281 is about 7545.4145678021. The cubic root of 56933281 is about 384.6998976918.

The spelling of 56933281 in words is "fifty-six million, nine hundred thirty-three thousand, two hundred eighty-one".