23120531 has 8 divisors (see below), whose sum is σ = 26617440. Its totient is φ = 19672128.

The previous prime is 23120501. The next prime is 23120551. The reversal of 23120531 is 13502132.

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

It is a de Polignac number, because none of the positive numbers 2^k-23120531 is a prime.

It is a super-2 number, since 2×23120531² = 1069117907443922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23120501) 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 7 ways as a sum of consecutive naturals, for example, 11096 + ... + 13013.

It is an arithmetic number, because the mean of its divisors is an integer number (3327180).

Almost surely, 2^23120531 is an apocalyptic number.

23120531 is a deficient number, since it is larger than the sum of its proper divisors (3496909).

23120531 is a wasteful number, since it uses less digits than its factorization.

23120531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24253.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 23120531 is about 4808.3813284722. The cubic root of 23120531 is about 284.8826068277.

Adding to 23120531 its reverse (13502132), we get a palindrome (36622663).

The spelling of 23120531 in words is "twenty-three million, one hundred twenty thousand, five hundred thirty-one".