56146681 has 2 divisors, whose sum is σ = 56146682. Its totient is φ = 56146680.

The previous prime is 56146679. The next prime is 56146721. The reversal of 56146681 is 18664165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32672656 + 23474025 = 5716^2 + 4845^2 .

It is a cyclic number.

It is not a de Polignac number, because 56146681 - 2¹ = 56146679 is a prime.

It is a super-2 number, since 2×56146681² = 6304899574631522, which contains 22 as substring.

Together with 56146679, 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 56146681.

It is not a weakly prime, because it can be changed into another prime (56146661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28073340 + 28073341.

It is an arithmetic number, because the mean of its divisors is an integer number (28073341).

Almost surely, 2^56146681 is an apocalyptic number.

It is an amenable number.

56146681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56146681 is an equidigital number, since it uses as much as digits as its factorization.

56146681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 56146681 is about 7493.1089008502. The cubic root of 56146681 is about 382.9199818291.

The spelling of 56146681 in words is "fifty-six million, one hundred forty-six thousand, six hundred eighty-one".