22154149 has 4 divisors (see below), whose sum is σ = 22174240. Its totient is φ = 22134060.

The previous prime is 22154137. The next prime is 22154177. The reversal of 22154149 is 94145122.

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 a cyclic number.

It is not a de Polignac number, because 22154149 - 2⁷ = 22154021 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 (22154189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8289 + ... + 10630.

It is an arithmetic number, because the mean of its divisors is an integer number (5543560).

Almost surely, 2^22154149 is an apocalyptic number.

It is an amenable number.

22154149 is a deficient number, since it is larger than the sum of its proper divisors (20091).

22154149 is a wasteful number, since it uses less digits than its factorization.

22154149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20090.

The product of its digits is 2880, while the sum is 28.

The square root of 22154149 is about 4706.8194144241. The cubic root of 22154149 is about 280.8568522384.

The spelling of 22154149 in words is "twenty-two million, one hundred fifty-four thousand, one hundred forty-nine".