22154839 has 8 divisors (see below), whose sum is σ = 25640960. Its totient is φ = 18749016.

The previous prime is 22154833. The next prime is 22154861. The reversal of 22154839 is 93845122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22154839 - 2⁷ = 22154711 is a prime.

It is a super-2 number, since 2×22154839² = 981673782231842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19479 + ... + 20584.

It is an arithmetic number, because the mean of its divisors is an integer number (3205120).

Almost surely, 2^22154839 is an apocalyptic number.

22154839 is a deficient number, since it is larger than the sum of its proper divisors (3486121).

22154839 is an equidigital number, since it uses as much as digits as its factorization.

22154839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40149.

The product of its digits is 17280, while the sum is 34.

The square root of 22154839 is about 4706.8927117579. The cubic root of 22154839 is about 280.8597680085.

The spelling of 22154839 in words is "twenty-two million, one hundred fifty-four thousand, eight hundred thirty-nine".