23120031 has 16 divisors (see below), whose sum is σ = 34266240. Its totient is φ = 13746720.

The previous prime is 23120029. The next prime is 23120033. The reversal of 23120031 is 13002132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23120029) and next prime (23120033).

It is not a de Polignac number, because 23120031 - 2¹ = 23120029 is a prime.

It is a super-2 number, since 2×23120031² = 1069071666881922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23119989 and 23120016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120033) 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, 4861 + ... + 8358.

It is an arithmetic number, because the mean of its divisors is an integer number (2141640).

Almost surely, 2^23120031 is an apocalyptic number.

23120031 is a deficient number, since it is larger than the sum of its proper divisors (11146209).

23120031 is a wasteful number, since it uses less digits than its factorization.

23120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13286.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 23120031 is about 4808.3293356425. The cubic root of 23120031 is about 284.8805532080.

Adding to 23120031 its reverse (13002132), we get a palindrome (36122163).

The spelling of 23120031 in words is "twenty-three million, one hundred twenty thousand, thirty-one".