56762221 has 2 divisors, whose sum is σ = 56762222. Its totient is φ = 56762220.

The previous prime is 56762213. The next prime is 56762231. The reversal of 56762221 is 12226765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52722121 + 4040100 = 7261^2 + 2010^2 .

It is a cyclic number.

It is not a de Polignac number, because 56762221 - 2³ = 56762213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56762231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28381110 + 28381111.

It is an arithmetic number, because the mean of its divisors is an integer number (28381111).

Almost surely, 2^56762221 is an apocalyptic number.

It is an amenable number.

56762221 is a deficient number, since it is larger than the sum of its proper divisors (1).

56762221 is an equidigital number, since it uses as much as digits as its factorization.

56762221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 56762221 is about 7534.0706792543. The cubic root of 56762221 is about 384.3142253131.

Adding to 56762221 its reverse (12226765), we get a palindrome (68988986).

The spelling of 56762221 in words is "fifty-six million, seven hundred sixty-two thousand, two hundred twenty-one".