31135147 has 2 divisors, whose sum is σ = 31135148. Its totient is φ = 31135146.

The previous prime is 31135121. The next prime is 31135151. The reversal of 31135147 is 74153113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31135147 - 2¹⁹ = 30610859 is a prime.

It is not a weakly prime, because it can be changed into another prime (31130147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15567573 + 15567574.

It is an arithmetic number, because the mean of its divisors is an integer number (15567574).

Almost surely, 2^31135147 is an apocalyptic number.

31135147 is a deficient number, since it is larger than the sum of its proper divisors (1).

31135147 is an equidigital number, since it uses as much as digits as its factorization.

31135147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 31135147 is about 5579.8877228848. The cubic root of 31135147 is about 314.5939068631.

The spelling of 31135147 in words is "thirty-one million, one hundred thirty-five thousand, one hundred forty-seven".