23431145 has 8 divisors (see below), whose sum is σ = 28715904. Its totient is φ = 18345904.

The previous prime is 23431139. The next prime is 23431147. The reversal of 23431145 is 54113432.

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 23431145 - 2¹² = 23427049 is a prime.

It is a super-2 number, since 2×23431145² = 1098037112022050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23431145.

It is not an unprimeable number, because it can be changed into a prime (23431147) 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, 49619 + ... + 50088.

It is an arithmetic number, because the mean of its divisors is an integer number (3589488).

Almost surely, 2^23431145 is an apocalyptic number.

It is an amenable number.

23431145 is a deficient number, since it is larger than the sum of its proper divisors (5284759).

23431145 is an equidigital number, since it uses as much as digits as its factorization.

23431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99759.

The product of its digits is 1440, while the sum is 23.

The square root of 23431145 is about 4840.5727966843. The cubic root of 23431145 is about 286.1526928459.

Adding to 23431145 its reverse (54113432), we get a palindrome (77544577).

The spelling of 23431145 in words is "twenty-three million, four hundred thirty-one thousand, one hundred forty-five".