31948159 has 2 divisors, whose sum is σ = 31948160. Its totient is φ = 31948158.

The previous prime is 31948123. The next prime is 31948193. The reversal of 31948159 is 95184913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31948159 - 2⁷ = 31948031 is a prime.

It is equal to p_1970788 and since 31948159 and 1970788 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31948199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974079 + 15974080.

It is an arithmetic number, because the mean of its divisors is an integer number (15974080).

Almost surely, 2^31948159 is an apocalyptic number.

31948159 is a deficient number, since it is larger than the sum of its proper divisors (1).

31948159 is an equidigital number, since it uses as much as digits as its factorization.

31948159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 31948159 is about 5652.2702518546. The cubic root of 31948159 is about 317.3086751087.

The spelling of 31948159 in words is "thirty-one million, nine hundred forty-eight thousand, one hundred fifty-nine".