56781353 has 2 divisors, whose sum is σ = 56781354. Its totient is φ = 56781352.

The previous prime is 56781317. The next prime is 56781359. The reversal of 56781353 is 35318765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 18983449 = 6148^2 + 4357^2 .

It is a cyclic number.

It is not a de Polignac number, because 56781353 - 2¹⁸ = 56519209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56781359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28390676 + 28390677.

It is an arithmetic number, because the mean of its divisors is an integer number (28390677).

Almost surely, 2^56781353 is an apocalyptic number.

It is an amenable number.

56781353 is a deficient number, since it is larger than the sum of its proper divisors (1).

56781353 is an equidigital number, since it uses as much as digits as its factorization.

56781353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 56781353 is about 7535.3402710163. The cubic root of 56781353 is about 384.3573988283.

The spelling of 56781353 in words is "fifty-six million, seven hundred eighty-one thousand, three hundred fifty-three".