23381522 has 4 divisors (see below), whose sum is σ = 35072286. Its totient is φ = 11690760.

The previous prime is 23381497. The next prime is 23381537. The reversal of 23381522 is 22518332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22363441 + 1018081 = 4729^2 + 1009^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23381491 and 23381500.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5845379 + ... + 5845382.

Almost surely, 2^23381522 is an apocalyptic number.

23381522 is a deficient number, since it is larger than the sum of its proper divisors (11690764).

23381522 is a wasteful number, since it uses less digits than its factorization.

23381522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11690763.

The product of its digits is 2880, while the sum is 26.

The square root of 23381522 is about 4835.4443435945. Note that the first 3 decimals coincide. The cubic root of 23381522 is about 285.9505432274.

Adding to 23381522 its reverse (22518332), we get a palindrome (45899854).

The spelling of 23381522 in words is "twenty-three million, three hundred eighty-one thousand, five hundred twenty-two".