56804381 has 2 divisors, whose sum is σ = 56804382. Its totient is φ = 56804380.

The previous prime is 56804353. The next prime is 56804387. The reversal of 56804381 is 18340865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55502500 + 1301881 = 7450^2 + 1141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56804381 is a prime.

It is a super-2 number, since 2×56804381² = 6453475401586322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56804387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28402190 + 28402191.

It is an arithmetic number, because the mean of its divisors is an integer number (28402191).

Almost surely, 2^56804381 is an apocalyptic number.

It is an amenable number.

56804381 is a deficient number, since it is larger than the sum of its proper divisors (1).

56804381 is an equidigital number, since it uses as much as digits as its factorization.

56804381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 56804381 is about 7536.8681161342. The cubic root of 56804381 is about 384.4093512473.

The spelling of 56804381 in words is "fifty-six million, eight hundred four thousand, three hundred eighty-one".