22453421 has 4 divisors (see below), whose sum is σ = 23635200. Its totient is φ = 21271644.

The previous prime is 22453399. The next prime is 22453423. The reversal of 22453421 is 12435422.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12435422 = 2 ⋅6217711.

It is a cyclic number.

It is not a de Polignac number, because 22453421 - 2²² = 18259117 is a prime.

It is a super-2 number, since 2×22453421² = 1008312229206482, 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 (22453423) 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, 590861 + ... + 590898.

It is an arithmetic number, because the mean of its divisors is an integer number (5908800).

Almost surely, 2^22453421 is an apocalyptic number.

It is an amenable number.

22453421 is a deficient number, since it is larger than the sum of its proper divisors (1181779).

22453421 is a wasteful number, since it uses less digits than its factorization.

22453421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181778.

The product of its digits is 1920, while the sum is 23.

The square root of 22453421 is about 4738.5040888449. The cubic root of 22453421 is about 282.1158628907.

Adding to 22453421 its reverse (12435422), we get a palindrome (34888843).

The spelling of 22453421 in words is "twenty-two million, four hundred fifty-three thousand, four hundred twenty-one".