22574821 has 4 divisors (see below), whose sum is σ = 22689612. Its totient is φ = 22460032.

The previous prime is 22574809. The next prime is 22574833. The reversal of 22574821 is 12847522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22574809) and next prime (22574833).

It can be written as a sum of positive squares in 2 ways, for example, as 21958596 + 616225 = 4686^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 22574821 - 2⁷ = 22574693 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 (22574221) 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, 57100 + ... + 57493.

It is an arithmetic number, because the mean of its divisors is an integer number (5672403).

Almost surely, 2^22574821 is an apocalyptic number.

It is an amenable number.

22574821 is a deficient number, since it is larger than the sum of its proper divisors (114791).

22574821 is a wasteful number, since it uses less digits than its factorization.

22574821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114790.

The product of its digits is 8960, while the sum is 31.

The square root of 22574821 is about 4751.2967703565. The cubic root of 22574821 is about 282.6233924634.

The spelling of 22574821 in words is "twenty-two million, five hundred seventy-four thousand, eight hundred twenty-one".