31671137 has 2 divisors, whose sum is σ = 31671138. Its totient is φ = 31671136.

The previous prime is 31671131. The next prime is 31671191. The reversal of 31671137 is 73117613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21911761 + 9759376 = 4681^2 + 3124^2 .

It is a cyclic number.

It is not a de Polignac number, because 31671137 - 2⁴ = 31671121 is a prime.

It is not a weakly prime, because it can be changed into another prime (31671131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15835568 + 15835569.

It is an arithmetic number, because the mean of its divisors is an integer number (15835569).

Almost surely, 2^31671137 is an apocalyptic number.

It is an amenable number.

31671137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31671137 is an equidigital number, since it uses as much as digits as its factorization.

31671137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 29.

The square root of 31671137 is about 5627.7115242343. The cubic root of 31671137 is about 316.3888852398.

The spelling of 31671137 in words is "thirty-one million, six hundred seventy-one thousand, one hundred thirty-seven".