56346221 has 2 divisors, whose sum is σ = 56346222. Its totient is φ = 56346220.

The previous prime is 56346203. The next prime is 56346223. The reversal of 56346221 is 12264365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 470596 = 7475^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 56346221 - 2²² = 52151917 is a prime.

Together with 56346223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56346223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28173110 + 28173111.

It is an arithmetic number, because the mean of its divisors is an integer number (28173111).

Almost surely, 2^56346221 is an apocalyptic number.

It is an amenable number.

56346221 is a deficient number, since it is larger than the sum of its proper divisors (1).

56346221 is an equidigital number, since it uses as much as digits as its factorization.

56346221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 56346221 is about 7506.4119924235. The cubic root of 56346221 is about 383.3730659929.

The spelling of 56346221 in words is "fifty-six million, three hundred forty-six thousand, two hundred twenty-one".