22731330 has 16 divisors (see below), whose sum is σ = 54555264. Its totient is φ = 6061680.

The previous prime is 22731323. The next prime is 22731341. The reversal of 22731330 is 3313722.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22731297 and 22731306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378826 + ... + 378885.

It is an arithmetic number, because the mean of its divisors is an integer number (3409704).

Almost surely, 2^22731330 is an apocalyptic number.

22731330 is an abundant number, since it is smaller than the sum of its proper divisors (31823934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22731330 is a wasteful number, since it uses less digits than its factorization.

22731330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757721.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 22731330 is about 4767.7384575918. The cubic root of 22731330 is about 283.2750222178.

The spelling of 22731330 in words is "twenty-two million, seven hundred thirty-one thousand, three hundred thirty".