23251330 has 16 divisors (see below), whose sum is σ = 43296120. Its totient is φ = 8979712.

The previous prime is 23251313. The next prime is 23251331. The reversal of 23251330 is 3315232.

It can be written as a sum of positive squares in 4 ways, for example, as 17901361 + 5349969 = 4231^2 + 2313^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23251298 and 23251307.

It is not an unprimeable number, because it can be changed into a prime (23251331) 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, 39799 + ... + 40378.

Almost surely, 2^23251330 is an apocalyptic number.

23251330 is a deficient number, since it is larger than the sum of its proper divisors (20044790).

23251330 is a wasteful number, since it uses less digits than its factorization.

23251330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80213.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 23251330 is about 4821.9632930996. The cubic root of 23251330 is about 285.4188158563.

Adding to 23251330 its reverse (3315232), we get a palindrome (26566562).

It can be divided in two parts, 2325 and 1330, that added together give a triangular number (3655 = T₈₅).

The spelling of 23251330 in words is "twenty-three million, two hundred fifty-one thousand, three hundred thirty".