31672071 has 24 divisors (see below), whose sum is σ = 48825504. Its totient is φ = 19714560.

The previous prime is 31672063. The next prime is 31672073. The reversal of 31672071 is 17027613.

It is not a de Polignac number, because 31672071 - 2³ = 31672063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31672073) 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 23 ways as a sum of consecutive naturals, for example, 20206 + ... + 21716.

It is an arithmetic number, because the mean of its divisors is an integer number (2034396).

Almost surely, 2^31672071 is an apocalyptic number.

31672071 is a deficient number, since it is larger than the sum of its proper divisors (17153433).

31672071 is a wasteful number, since it uses less digits than its factorization.

31672071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 31672071 is about 5627.7945058433. The cubic root of 31672071 is about 316.3919953724.

Adding to 31672071 its reverse (17027613), we get a palindrome (48699684).

The spelling of 31672071 in words is "thirty-one million, six hundred seventy-two thousand, seventy-one".