23222557 has 4 divisors (see below), whose sum is σ = 23340636. Its totient is φ = 23104480.

The previous prime is 23222543. The next prime is 23222567. The reversal of 23222557 is 75522232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22410756 + 811801 = 4734^2 + 901^2 .

It is a cyclic number.

It is not a de Polignac number, because 23222557 - 2⁷ = 23222429 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 (23222567) 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, 58744 + ... + 59137.

It is an arithmetic number, because the mean of its divisors is an integer number (5835159).

Almost surely, 2^23222557 is an apocalyptic number.

It is an amenable number.

23222557 is a deficient number, since it is larger than the sum of its proper divisors (118079).

23222557 is a wasteful number, since it uses less digits than its factorization.

23222557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118078.

The product of its digits is 8400, while the sum is 28.

The square root of 23222557 is about 4818.9788337365. The cubic root of 23222557 is about 285.3010341286.

Adding to 23222557 its reverse (75522232), we get a palindrome (98744789).

The spelling of 23222557 in words is "twenty-three million, two hundred twenty-two thousand, five hundred fifty-seven".