23272731 has 16 divisors (see below), whose sum is σ = 34561920. Its totient is φ = 15477480.

The previous prime is 23272729. The next prime is 23272751. The reversal of 23272731 is 13727232.

It is a happy number.

It is not a de Polignac number, because 23272731 - 2¹ = 23272729 is a prime.

It is a super-2 number, since 2×23272731² = 1083240016396722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 23272695 and 23272704.

It is not an unprimeable number, because it can be changed into a prime (23272751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14436 + ... + 15966.

It is an arithmetic number, because the mean of its divisors is an integer number (2160120).

Almost surely, 2^23272731 is an apocalyptic number.

23272731 is a deficient number, since it is larger than the sum of its proper divisors (11289189).

23272731 is a wasteful number, since it uses less digits than its factorization.

23272731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2097 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 23272731 is about 4824.1818995556. The cubic root of 23272731 is about 285.5063574433.

Adding to 23272731 its reverse (13727232), we get a palindrome (36999963).

The spelling of 23272731 in words is "twenty-three million, two hundred seventy-two thousand, seven hundred thirty-one".