23220142 has 24 divisors (see below), whose sum is σ = 38543400. Its totient is φ = 10483440.

The previous prime is 23220139. The next prime is 23220149. The reversal of 23220142 is 24102232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55209 + ... + 55627.

It is an arithmetic number, because the mean of its divisors is an integer number (1605975).

Almost surely, 2^23220142 is an apocalyptic number.

23220142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

23220142 is a deficient number, since it is larger than the sum of its proper divisors (15323258).

23220142 is a wasteful number, since it uses less digits than its factorization.

23220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 23220142 is about 4818.7282554633. The cubic root of 23220142 is about 285.2911439475.

Adding to 23220142 its reverse (24102232), we get a palindrome (47322374).

The spelling of 23220142 in words is "twenty-three million, two hundred twenty thousand, one hundred forty-two".