16222639 has 2 divisors, whose sum is σ = 16222640. Its totient is φ = 16222638.

The previous prime is 16222631. The next prime is 16222649. The reversal of 16222639 is 93622261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16222639 - 2³ = 16222631 is a prime.

It is a super-2 number, since 2×16222639² = 526348032248642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16222639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16222631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111319 + 8111320.

It is an arithmetic number, because the mean of its divisors is an integer number (8111320).

Almost surely, 2^16222639 is an apocalyptic number.

16222639 is a deficient number, since it is larger than the sum of its proper divisors (1).

16222639 is an equidigital number, since it uses as much as digits as its factorization.

16222639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 16222639 is about 4027.7337300273. The cubic root of 16222639 is about 253.1476118397.

It can be divided in two parts, 16222 and 639, that added together give a palindrome (16861).

The spelling of 16222639 in words is "sixteen million, two hundred twenty-two thousand, six hundred thirty-nine".