56491229 has 2 divisors, whose sum is σ = 56491230. Its totient is φ = 56491228.

The previous prime is 56491213. The next prime is 56491231. The reversal of 56491229 is 92219465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51984100 + 4507129 = 7210^2 + 2123^2 .

It is a cyclic number.

It is not a de Polignac number, because 56491229 - 2⁴ = 56491213 is a prime.

Together with 56491231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56491192 and 56491201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56491249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28245614 + 28245615.

It is an arithmetic number, because the mean of its divisors is an integer number (28245615).

Almost surely, 2^56491229 is an apocalyptic number.

It is an amenable number.

56491229 is a deficient number, since it is larger than the sum of its proper divisors (1).

56491229 is an equidigital number, since it uses as much as digits as its factorization.

56491229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 56491229 is about 7516.0647283003. The cubic root of 56491229 is about 383.7016567395.

The spelling of 56491229 in words is "fifty-six million, four hundred ninety-one thousand, two hundred twenty-nine".