31672249 has 4 divisors (see below), whose sum is σ = 36196864. Its totient is φ = 27147636.

The previous prime is 31672231. The next prime is 31672253. The reversal of 31672249 is 94227613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94227613 = 4957 ⋅19009.

It is a cyclic number.

It is not a de Polignac number, because 31672249 - 2⁹ = 31671737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31672229) 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, 2262297 + ... + 2262310.

It is an arithmetic number, because the mean of its divisors is an integer number (9049216).

Almost surely, 2^31672249 is an apocalyptic number.

It is an amenable number.

31672249 is a deficient number, since it is larger than the sum of its proper divisors (4524615).

31672249 is an equidigital number, since it uses as much as digits as its factorization.

31672249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524614.

The product of its digits is 18144, while the sum is 34.

The square root of 31672249 is about 5627.8103201867. The cubic root of 31672249 is about 316.3925880889.

The spelling of 31672249 in words is "thirty-one million, six hundred seventy-two thousand, two hundred forty-nine".