23031745 has 12 divisors (see below), whose sum is σ = 30379860. Its totient is φ = 16749920.

The previous prime is 23031683. The next prime is 23031769. The reversal of 23031745 is 54713032.

It can be written as a sum of positive squares in 2 ways, for example, as 11478544 + 11553201 = 3388^2 + 3399^2 .

It is not a de Polignac number, because 23031745 - 2¹¹ = 23029697 is a prime.

It is a super-2 number, since 2×23031745² = 1060922555490050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18430 + ... + 19639.

It is an arithmetic number, because the mean of its divisors is an integer number (2531655).

Almost surely, 2^23031745 is an apocalyptic number.

It is an amenable number.

23031745 is a deficient number, since it is larger than the sum of its proper divisors (7348115).

23031745 is a wasteful number, since it uses less digits than its factorization.

23031745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38096 (or 38085 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 23031745 is about 4799.1400271299. The cubic root of 23031745 is about 284.5174763249.

Adding to 23031745 its reverse (54713032), we get a palindrome (77744777).

The spelling of 23031745 in words is "twenty-three million, thirty-one thousand, seven hundred forty-five".