22749231 has 16 divisors (see below), whose sum is σ = 31762944. Its totient is φ = 14455584.

The previous prime is 22749203. The next prime is 22749239. The reversal of 22749231 is 13294722.

It is not a de Polignac number, because 22749231 - 2¹¹ = 22747183 is a prime.

It is a super-2 number, since 2×22749231² = 1035055022182722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22749239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33265 + ... + 33941.

It is an arithmetic number, because the mean of its divisors is an integer number (1985184).

Almost surely, 2^22749231 is an apocalyptic number.

22749231 is a deficient number, since it is larger than the sum of its proper divisors (9013713).

22749231 is a wasteful number, since it uses less digits than its factorization.

22749231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190.

The product of its digits is 6048, while the sum is 30.

The square root of 22749231 is about 4769.6153932995. The cubic root of 22749231 is about 283.3493627225.

The spelling of 22749231 in words is "twenty-two million, seven hundred forty-nine thousand, two hundred thirty-one".