23431330 has 16 divisors (see below), whose sum is σ = 45420984. Its totient is φ = 8651520.

The previous prime is 23431327. The next prime is 23431357. The reversal of 23431330 is 3313432.

It can be written as a sum of positive squares in 4 ways, for example, as 7198489 + 16232841 = 2683^2 + 4029^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23431298 and 23431307.

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, 89991 + ... + 90250.

Almost surely, 2^23431330 is an apocalyptic number.

23431330 is a deficient number, since it is larger than the sum of its proper divisors (21989654).

23431330 is a wasteful number, since it uses less digits than its factorization.

23431330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180261.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 23431330 is about 4840.5919059553. The cubic root of 23431330 is about 286.1534459477.

Adding to 23431330 its reverse (3313432), we get a palindrome (26744762).

The spelling of 23431330 in words is "twenty-three million, four hundred thirty-one thousand, three hundred thirty".