23142156 has 12 divisors (see below), whose sum is σ = 53998392. Its totient is φ = 7714048.

The previous prime is 23142107. The next prime is 23142157. The reversal of 23142156 is 65124132.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (23142157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964245 + ... + 964268.

It is an arithmetic number, because the mean of its divisors is an integer number (4499866).

Almost surely, 2^23142156 is an apocalyptic number.

It is an amenable number.

23142156 is an abundant number, since it is smaller than the sum of its proper divisors (30856236).

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

23142156 is a wasteful number, since it uses less digits than its factorization.

23142156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928520 (or 1928518 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 23142156 is about 4810.6294806397. The cubic root of 23142156 is about 284.9713975605.

Adding to 23142156 its reverse (65124132), we get a palindrome (88266288).

The spelling of 23142156 in words is "twenty-three million, one hundred forty-two thousand, one hundred fifty-six".