22145493 has 4 divisors (see below), whose sum is σ = 29527328. Its totient is φ = 14763660.

The previous prime is 22145477. The next prime is 22145503. The reversal of 22145493 is 39454122.

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 22145493 - 2⁴ = 22145477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22145493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22145293) 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, 3690913 + ... + 3690918.

It is an arithmetic number, because the mean of its divisors is an integer number (7381832).

Almost surely, 2^22145493 is an apocalyptic number.

It is an amenable number.

22145493 is a deficient number, since it is larger than the sum of its proper divisors (7381835).

22145493 is an equidigital number, since it uses as much as digits as its factorization.

22145493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381834.

The product of its digits is 8640, while the sum is 30.

The square root of 22145493 is about 4705.8998076882. The cubic root of 22145493 is about 280.8202689689.

The spelling of 22145493 in words is "twenty-two million, one hundred forty-five thousand, four hundred ninety-three".