22099401 has 9 divisors (see below), whose sum is σ = 31941741. Its totient is φ = 14723532.

The previous prime is 22099393. The next prime is 22099403. The reversal of 22099401 is 10499022.

The square root of 22099401 is 4701.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 22099401 - 2³ = 22099393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22099403) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13320 + ... + 14886.

Almost surely, 2^22099401 is an apocalyptic number.

22099401 is the 4701-st square number.

22099401 is the 2351-st centered octagonal number.

It is an amenable number.

22099401 is a deficient number, since it is larger than the sum of its proper divisors (9842340).

22099401 is an frugal number, since it uses more digits than its factorization.

22099401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The cubic root of 22099401 is about 280.6253074303.

Multiplying 22099401 by its product of nonzero digits (1296), we get a square (28640823696 = 169236²).

It can be divided in two parts, 22099 and 401, that added together give a square (22500 = 150²).

The spelling of 22099401 in words is "twenty-two million, ninety-nine thousand, four hundred one".