22477381 has 4 divisors (see below), whose sum is σ = 22695712. Its totient is φ = 22259052.

The previous prime is 22477379. The next prime is 22477397. The reversal of 22477381 is 18377422.

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 22477381 - 2¹ = 22477379 is a prime.

It is a super-2 number, since 2×22477381² = 1010465313238322, 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 (22477331) 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, 109011 + ... + 109216.

It is an arithmetic number, because the mean of its divisors is an integer number (5673928).

Almost surely, 2^22477381 is an apocalyptic number.

It is an amenable number.

22477381 is a deficient number, since it is larger than the sum of its proper divisors (218331).

22477381 is a wasteful number, since it uses less digits than its factorization.

22477381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218330.

The product of its digits is 18816, while the sum is 34.

The square root of 22477381 is about 4741.0316387892. The cubic root of 22477381 is about 282.2161756397.

The spelling of 22477381 in words is "twenty-two million, four hundred seventy-seven thousand, three hundred eighty-one".