21695622 has 16 divisors (see below), whose sum is σ = 46729200. Its totient is φ = 6675552.

The previous prime is 21695617. The next prime is 21695627. The reversal of 21695622 is 22659612.

It is an interprime number because it is at equal distance from previous prime (21695617) and next prime (21695627).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21695627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138997 + ... + 139152.

It is an arithmetic number, because the mean of its divisors is an integer number (2920575).

Almost surely, 2^21695622 is an apocalyptic number.

21695622 is an abundant number, since it is smaller than the sum of its proper divisors (25033578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21695622 is a wasteful number, since it uses less digits than its factorization.

21695622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278167.

The product of its digits is 12960, while the sum is 33.

The square root of 21695622 is about 4657.8559445307. The cubic root of 21695622 is about 278.9056861878.

The spelling of 21695622 in words is "twenty-one million, six hundred ninety-five thousand, six hundred twenty-two".