222626621 has 4 divisors (see below), whose sum is σ = 254430432. Its totient is φ = 190822812.

The previous prime is 222626603. The next prime is 222626623. The reversal of 222626621 is 126626222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222626621 - 2¹⁴ = 222610237 is a prime.

It is a super-2 number, since 2×222626621² = 99125224755755282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222626623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15901895 + ... + 15901908.

It is an arithmetic number, because the mean of its divisors is an integer number (63607608).

Almost surely, 2^222626621 is an apocalyptic number.

It is an amenable number.

222626621 is a deficient number, since it is larger than the sum of its proper divisors (31803811).

222626621 is an equidigital number, since it uses as much as digits as its factorization.

222626621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31803810.

The product of its digits is 6912, while the sum is 29.

The square root of 222626621 is about 14920.6776320648. The cubic root of 222626621 is about 606.0740622991.

The spelling of 222626621 in words is "two hundred twenty-two million, six hundred twenty-six thousand, six hundred twenty-one".