22730257 has 8 divisors (see below), whose sum is σ = 24832512. Its totient is φ = 20634000.

The previous prime is 22730249. The next prime is 22730261. The reversal of 22730257 is 75203722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22730257 - 2³ = 22730249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22730957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11007 + ... + 12907.

It is an arithmetic number, because the mean of its divisors is an integer number (3104064).

Almost surely, 2^22730257 is an apocalyptic number.

It is an amenable number.

22730257 is a deficient number, since it is larger than the sum of its proper divisors (2102255).

22730257 is a wasteful number, since it uses less digits than its factorization.

22730257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 22730257 is about 4767.6259291182. The cubic root of 22730257 is about 283.2705649499.

Adding to 22730257 its reverse (75203722), we get a palindrome (97933979).

The spelling of 22730257 in words is "twenty-two million, seven hundred thirty thousand, two hundred fifty-seven".