22215629 has 2 divisors, whose sum is σ = 22215630. Its totient is φ = 22215628.

The previous prime is 22215607. The next prime is 22215667. The reversal of 22215629 is 92651222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16080100 + 6135529 = 4010^2 + 2477^2 .

It is a cyclic number.

It is not a de Polignac number, because 22215629 - 2¹² = 22211533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22215689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107814 + 11107815.

It is an arithmetic number, because the mean of its divisors is an integer number (11107815).

Almost surely, 2^22215629 is an apocalyptic number.

It is an amenable number.

22215629 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215629 is an equidigital number, since it uses as much as digits as its factorization.

22215629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 22215629 is about 4713.3458392102. The cubic root of 22215629 is about 281.1164143220.

It can be divided in two parts, 222 and 15629, that added together give a palindrome (15851).

The spelling of 22215629 in words is "twenty-two million, two hundred fifteen thousand, six hundred twenty-nine".