23225731 has 4 divisors (see below), whose sum is σ = 23263992. Its totient is φ = 23187472.

The previous prime is 23225717. The next prime is 23225737. The reversal of 23225731 is 13752232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23225731 is a prime.

It is a super-2 number, since 2×23225731² = 1078869160968722, 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 = 23225696 and 23225705.

It is not an unprimeable number, because it can be changed into a prime (23225737) 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 3 ways as a sum of consecutive naturals, for example, 18205 + ... + 19438.

It is an arithmetic number, because the mean of its divisors is an integer number (5815998).

Almost surely, 2^23225731 is an apocalyptic number.

23225731 is a deficient number, since it is larger than the sum of its proper divisors (38261).

23225731 is an equidigital number, since it uses as much as digits as its factorization.

23225731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38260.

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

The square root of 23225731 is about 4819.3081453669. The cubic root of 23225731 is about 285.3140316096.

Adding to 23225731 its reverse (13752232), we get a palindrome (36977963).

The spelling of 23225731 in words is "twenty-three million, two hundred twenty-five thousand, seven hundred thirty-one".