23213442 has 32 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 6612048.

The previous prime is 23213429. The next prime is 23213447. The reversal of 23213442 is 24431232.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (23213447) 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, 17809 + ... + 19067.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^23213442 is an apocalyptic number.

23213442 is an abundant number, since it is smaller than the sum of its proper divisors (30008958).

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

23213442 is a wasteful number, since it uses less digits than its factorization.

23213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710.

The product of its digits is 1152, while the sum is 21.

The square root of 23213442 is about 4818.0330011323. The cubic root of 23213442 is about 285.2637017591.

Adding to 23213442 its reverse (24431232), we get a palindrome (47644674).

The spelling of 23213442 in words is "twenty-three million, two hundred thirteen thousand, four hundred forty-two".