31144147 has 2 divisors, whose sum is σ = 31144148. Its totient is φ = 31144146.

The previous prime is 31144111. The next prime is 31144163. The reversal of 31144147 is 74144113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31144147 - 2¹¹ = 31142099 is a prime.

It is not a weakly prime, because it can be changed into another prime (31144847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572073 + 15572074.

It is an arithmetic number, because the mean of its divisors is an integer number (15572074).

Almost surely, 2^31144147 is an apocalyptic number.

31144147 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144147 is an equidigital number, since it uses as much as digits as its factorization.

31144147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 31144147 is about 5580.6941324534. The cubic root of 31144147 is about 314.6242163650.

The spelling of 31144147 in words is "thirty-one million, one hundred forty-four thousand, one hundred forty-seven".