31672271 has 4 divisors (see below), whose sum is σ = 31766592. Its totient is φ = 31577952.

The previous prime is 31672261. The next prime is 31672273. The reversal of 31672271 is 17227613.

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

It is a cyclic number.

It is not a de Polignac number, because 31672271 - 2¹⁰ = 31671247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31672273) 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, 46655 + ... + 47328.

It is an arithmetic number, because the mean of its divisors is an integer number (7941648).

Almost surely, 2^31672271 is an apocalyptic number.

31672271 is a deficient number, since it is larger than the sum of its proper divisors (94321).

31672271 is an equidigital number, since it uses as much as digits as its factorization.

31672271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94320.

The product of its digits is 3528, while the sum is 29.

The square root of 31672271 is about 5627.8122747654. The cubic root of 31672271 is about 316.3926613458.

Adding to 31672271 its reverse (17227613), we get a palindrome (48899884).

The spelling of 31672271 in words is "thirty-one million, six hundred seventy-two thousand, two hundred seventy-one".