56446921 has 2 divisors, whose sum is σ = 56446922. Its totient is φ = 56446920.

The previous prime is 56446913. The next prime is 56446979. The reversal of 56446921 is 12964465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54597321 + 1849600 = 7389^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 56446921 - 2³ = 56446913 is a prime.

It is not a weakly prime, because it can be changed into another prime (56446021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28223460 + 28223461.

It is an arithmetic number, because the mean of its divisors is an integer number (28223461).

Almost surely, 2^56446921 is an apocalyptic number.

It is an amenable number.

56446921 is a deficient number, since it is larger than the sum of its proper divisors (1).

56446921 is an equidigital number, since it uses as much as digits as its factorization.

56446921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 56446921 is about 7513.1165969922. The cubic root of 56446921 is about 383.6013137300.

The spelling of 56446921 in words is "fifty-six million, four hundred forty-six thousand, nine hundred twenty-one".