22021149 has 4 divisors (see below), whose sum is σ = 29361536. Its totient is φ = 14680764.

The previous prime is 22021123. The next prime is 22021151. The reversal of 22021149 is 94112022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22021149 - 2¹³ = 22012957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3670189 + ... + 3670194.

It is an arithmetic number, because the mean of its divisors is an integer number (7340384).

Almost surely, 2^22021149 is an apocalyptic number.

It is an amenable number.

22021149 is a deficient number, since it is larger than the sum of its proper divisors (7340387).

22021149 is an equidigital number, since it uses as much as digits as its factorization.

22021149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340386.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 22021149 is about 4692.6697092380. The cubic root of 22021149 is about 280.2936926877.

The spelling of 22021149 in words is "twenty-two million, twenty-one thousand, one hundred forty-nine".