23143656 has 32 divisors (see below), whose sum is σ = 58125600. Its totient is φ = 7679040.

The previous prime is 23143607. The next prime is 23143667. The reversal of 23143656 is 65634132.

It is a super-3 number, since 3×23143656³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3391 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (1816425).

Almost surely, 2^23143656 is an apocalyptic number.

It is an amenable number.

23143656 is an abundant number, since it is smaller than the sum of its proper divisors (34981944).

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

23143656 is a wasteful number, since it uses less digits than its factorization.

23143656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449 (or 4445 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 23143656 is about 4810.7853828663. The cubic root of 23143656 is about 284.9775544034.

Adding to 23143656 its reverse (65634132), we get a palindrome (88777788).

The spelling of 23143656 in words is "twenty-three million, one hundred forty-three thousand, six hundred fifty-six".