22099251 has 16 divisors (see below), whose sum is σ = 31332096. Its totient is φ = 13824096.

The previous prime is 22099199. The next prime is 22099271. The reversal of 22099251 is 15299022.

It is not a de Polignac number, because 22099251 - 2¹⁵ = 22066483 is a prime.

It is a super-2 number, since 2×22099251² = 976753789522002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22099271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636 + ... + 6678.

It is an arithmetic number, because the mean of its divisors is an integer number (1958256).

Almost surely, 2^22099251 is an apocalyptic number.

22099251 is a deficient number, since it is larger than the sum of its proper divisors (9232845).

22099251 is a wasteful number, since it uses less digits than its factorization.

22099251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 22099251 is about 4700.9840459206. The cubic root of 22099251 is about 280.6246725128.

The spelling of 22099251 in words is "twenty-two million, ninety-nine thousand, two hundred fifty-one".