56653381 has 2 divisors, whose sum is σ = 56653382. Its totient is φ = 56653380.

The previous prime is 56653379. The next prime is 56653427. The reversal of 56653381 is 18335665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55130625 + 1522756 = 7425^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 56653381 - 2¹ = 56653379 is a prime.

It is a super-2 number, since 2×56653381² = 6419211157462322, which contains 22 as substring.

Together with 56653379, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 56653381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56653781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28326690 + 28326691.

It is an arithmetic number, because the mean of its divisors is an integer number (28326691).

Almost surely, 2^56653381 is an apocalyptic number.

It is an amenable number.

56653381 is a deficient number, since it is larger than the sum of its proper divisors (1).

56653381 is an equidigital number, since it uses as much as digits as its factorization.

56653381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 56653381 is about 7526.8440265492. The cubic root of 56653381 is about 384.0684308203.

The spelling of 56653381 in words is "fifty-six million, six hundred fifty-three thousand, three hundred eighty-one".