56138671 has 2 divisors, whose sum is σ = 56138672. Its totient is φ = 56138670.

The previous prime is 56138669. The next prime is 56138683. The reversal of 56138671 is 17683165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56138671 - 2¹ = 56138669 is a prime.

Together with 56138669, 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 56138671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56138651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28069335 + 28069336.

It is an arithmetic number, because the mean of its divisors is an integer number (28069336).

Almost surely, 2^56138671 is an apocalyptic number.

56138671 is a deficient number, since it is larger than the sum of its proper divisors (1).

56138671 is an equidigital number, since it uses as much as digits as its factorization.

56138671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 56138671 is about 7492.5743906884. The cubic root of 56138671 is about 382.9017715813.

The spelling of 56138671 in words is "fifty-six million, one hundred thirty-eight thousand, six hundred seventy-one".