23045531 has 4 divisors (see below), whose sum is σ = 23323272. Its totient is φ = 22767792.

The previous prime is 23045497. The next prime is 23045573. The reversal of 23045531 is 13554032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23045531 - 2⁶ = 23045467 is a prime.

It is a super-2 number, since 2×23045531² = 1062192998143922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23045497 and 23045506.

It is not an unprimeable number, because it can be changed into a prime (23045131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138746 + ... + 138911.

It is an arithmetic number, because the mean of its divisors is an integer number (5830818).

Almost surely, 2^23045531 is an apocalyptic number.

23045531 is a deficient number, since it is larger than the sum of its proper divisors (277741).

23045531 is an equidigital number, since it uses as much as digits as its factorization.

23045531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277740.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 23045531 is about 4800.5761112600. The cubic root of 23045531 is about 284.5742324180.

Adding to 23045531 its reverse (13554032), we get a palindrome (36599563).

The spelling of 23045531 in words is "twenty-three million, forty-five thousand, five hundred thirty-one".