12229731 has 8 divisors (see below), whose sum is σ = 18118160. Its totient is φ = 8153136.

The previous prime is 12229709. The next prime is 12229733. The reversal of 12229731 is 13792221.

It is not a de Polignac number, because 12229731 - 2⁵ = 12229699 is a prime.

It is a super-2 number, since 2×12229731² = 299132640664722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 452953 = 12229731 / (1 + 2 + 2 + 2 + 9 + 7 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12229695 and 12229704.

It is not an unprimeable number, because it can be changed into a prime (12229733) 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 7 ways as a sum of consecutive naturals, for example, 226450 + ... + 226503.

It is an arithmetic number, because the mean of its divisors is an integer number (2264770).

Almost surely, 2^12229731 is an apocalyptic number.

12229731 is a deficient number, since it is larger than the sum of its proper divisors (5888429).

12229731 is an equidigital number, since it uses as much as digits as its factorization.

12229731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452962 (or 452956 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12229731 is about 3497.1032298175. The cubic root of 12229731 is about 230.3946030094.

The spelling of 12229731 in words is "twelve million, two hundred twenty-nine thousand, seven hundred thirty-one".