31160249 has 2 divisors, whose sum is σ = 31160250. Its totient is φ = 31160248.

The previous prime is 31160231. The next prime is 31160273. The reversal of 31160249 is 94206113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23348224 + 7812025 = 4832^2 + 2795^2 .

It is an emirp because it is prime and its reverse (94206113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31160249 is a prime.

It is a super-2 number, since 2×31160249² = 1941922235484002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31160299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15580124 + 15580125.

It is an arithmetic number, because the mean of its divisors is an integer number (15580125).

Almost surely, 2^31160249 is an apocalyptic number.

It is an amenable number.

31160249 is a deficient number, since it is larger than the sum of its proper divisors (1).

31160249 is an equidigital number, since it uses as much as digits as its factorization.

31160249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 31160249 is about 5582.1365981137. The cubic root of 31160249 is about 314.6784288660.

The spelling of 31160249 in words is "thirty-one million, one hundred sixty thousand, two hundred forty-nine".