222629621 has 2 divisors, whose sum is σ = 222629622. Its totient is φ = 222629620.

The previous prime is 222629587. The next prime is 222629651. The reversal of 222629621 is 126926222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222159025 + 470596 = 14905^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 222629621 - 2¹⁰ = 222628597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222629651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111314810 + 111314811.

It is an arithmetic number, because the mean of its divisors is an integer number (111314811).

Almost surely, 2^222629621 is an apocalyptic number.

It is an amenable number.

222629621 is a deficient number, since it is larger than the sum of its proper divisors (1).

222629621 is an equidigital number, since it uses as much as digits as its factorization.

222629621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 222629621 is about 14920.7781633533. The cubic root of 222629621 is about 606.0767846660.

The spelling of 222629621 in words is "two hundred twenty-two million, six hundred twenty-nine thousand, six hundred twenty-one".