62220721 has 2 divisors, whose sum is σ = 62220722. Its totient is φ = 62220720.

The previous prime is 62220713. The next prime is 62220737. The reversal of 62220721 is 12702226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61842496 + 378225 = 7864^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 62220721 - 2³ = 62220713 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 62220692 and 62220701.

It is not a weakly prime, because it can be changed into another prime (62221721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31110360 + 31110361.

It is an arithmetic number, because the mean of its divisors is an integer number (31110361).

Almost surely, 2^62220721 is an apocalyptic number.

It is an amenable number.

62220721 is a deficient number, since it is larger than the sum of its proper divisors (1).

62220721 is an equidigital number, since it uses as much as digits as its factorization.

62220721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 62220721 is about 7888.0112195661. The cubic root of 62220721 is about 396.2582766534.

Adding to 62220721 its reverse (12702226), we get a palindrome (74922947).

The spelling of 62220721 in words is "sixty-two million, two hundred twenty thousand, seven hundred twenty-one".