23122731 has 8 divisors (see below), whose sum is σ = 31486464. Its totient is φ = 15087080.

The previous prime is 23122727. The next prime is 23122733. The reversal of 23122731 is 13722132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23122731 - 2² = 23122727 is a prime.

It is a super-2 number, since 2×23122731² = 1069321377796722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23122698 and 23122707.

It is not an unprimeable number, because it can be changed into a prime (23122733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81855 + ... + 82136.

It is an arithmetic number, because the mean of its divisors is an integer number (3935808).

Almost surely, 2^23122731 is an apocalyptic number.

23122731 is a deficient number, since it is larger than the sum of its proper divisors (8363733).

23122731 is a wasteful number, since it uses less digits than its factorization.

23122731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164041.

The product of its digits is 504, while the sum is 21.

The square root of 23122731 is about 4808.6100902444. The cubic root of 23122731 is about 284.8916424024.

Adding to 23122731 its reverse (13722132), we get a palindrome (36844863).

The spelling of 23122731 in words is "twenty-three million, one hundred twenty-two thousand, seven hundred thirty-one".