22149531 has 20 divisors (see below), whose sum is σ = 34158784. Its totient is φ = 14288400.

The previous prime is 22149503. The next prime is 22149559. The reversal of 22149531 is 13594122.

It is an interprime number because it is at equal distance from previous prime (22149503) and next prime (22149559).

It is not a de Polignac number, because 22149531 - 2⁵ = 22149499 is a prime.

It is a super-2 number, since 2×22149531² = 981203447039922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 22149495 and 22149504.

It is not an unprimeable number, because it can be changed into a prime (22149571) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1900 + ... + 6921.

Almost surely, 2^22149531 is an apocalyptic number.

22149531 is a deficient number, since it is larger than the sum of its proper divisors (12009253).

22149531 is an equidigital number, since it uses as much as digits as its factorization.

22149531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8864 (or 8855 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 22149531 is about 4706.3288240411. The cubic root of 22149531 is about 280.8373361487.

The spelling of 22149531 in words is "twenty-two million, one hundred forty-nine thousand, five hundred thirty-one".