56842381 has 2 divisors, whose sum is σ = 56842382. Its totient is φ = 56842380.

The previous prime is 56842369. The next prime is 56842427. The reversal of 56842381 is 18324865.

It is a happy number.

56842381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56761156 + 81225 = 7534^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 56842381 - 2¹³ = 56834189 is a prime.

It is a super-2 number, since 2×56842381² = 6462112555498322, 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 56842381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56842081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28421190 + 28421191.

It is an arithmetic number, because the mean of its divisors is an integer number (28421191).

Almost surely, 2^56842381 is an apocalyptic number.

It is an amenable number.

56842381 is a deficient number, since it is larger than the sum of its proper divisors (1).

56842381 is an equidigital number, since it uses as much as digits as its factorization.

56842381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 56842381 is about 7539.3886356919. The cubic root of 56842381 is about 384.4950506188.

The spelling of 56842381 in words is "fifty-six million, eight hundred forty-two thousand, three hundred eighty-one".