31112051 has 2 divisors, whose sum is σ = 31112052. Its totient is φ = 31112050.

The previous prime is 31112033. The next prime is 31112083. The reversal of 31112051 is 15021113.

It is a weak prime.

It is an emirp because it is prime and its reverse (15021113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112051 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556025 + 15556026.

It is an arithmetic number, because the mean of its divisors is an integer number (15556026).

Almost surely, 2^31112051 is an apocalyptic number.

31112051 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112051 is an equidigital number, since it uses as much as digits as its factorization.

31112051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 31112051 is about 5577.8177632476. The cubic root of 31112051 is about 314.5160992093.

Adding to 31112051 its reverse (15021113), we get a palindrome (46133164).

The spelling of 31112051 in words is "thirty-one million, one hundred twelve thousand, fifty-one".