56217407 has 2 divisors, whose sum is σ = 56217408. Its totient is φ = 56217406.

The previous prime is 56217401. The next prime is 56217431. The reversal of 56217407 is 70471265.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56217407 - 2⁴ = 56217391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56217401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28108703 + 28108704.

It is an arithmetic number, because the mean of its divisors is an integer number (28108704).

Almost surely, 2^56217407 is an apocalyptic number.

56217407 is a deficient number, since it is larger than the sum of its proper divisors (1).

56217407 is an equidigital number, since it uses as much as digits as its factorization.

56217407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 56217407 is about 7497.8268184855. The cubic root of 56217407 is about 383.0806979778.

The spelling of 56217407 in words is "fifty-six million, two hundred seventeen thousand, four hundred seven".