31672817 has 12 divisors (see below), whose sum is σ = 36126384. Its totient is φ = 27536520.

The previous prime is 31672807. The next prime is 31672859. The reversal of 31672817 is 71827613.

It is not a de Polignac number, because 31672817 - 2¹⁶ = 31607281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31672807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3098 + ... + 8540.

It is an arithmetic number, because the mean of its divisors is an integer number (3010532).

Almost surely, 2^31672817 is an apocalyptic number.

It is an amenable number.

31672817 is a deficient number, since it is larger than the sum of its proper divisors (4453567).

31672817 is a wasteful number, since it uses less digits than its factorization.

31672817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500 (or 5477 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 31672817 is about 5627.8607836371. The cubic root of 31672817 is about 316.3944794388.

The spelling of 31672817 in words is "thirty-one million, six hundred seventy-two thousand, eight hundred seventeen".