31948351 has 2 divisors, whose sum is σ = 31948352. Its totient is φ = 31948350.

The previous prime is 31948339. The next prime is 31948361. The reversal of 31948351 is 15384913.

It is a strong prime.

It is an emirp because it is prime and its reverse (15384913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31948351 - 2¹¹ = 31946303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31948361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974175 + 15974176.

It is an arithmetic number, because the mean of its divisors is an integer number (15974176).

Almost surely, 2^31948351 is an apocalyptic number.

31948351 is a deficient number, since it is larger than the sum of its proper divisors (1).

31948351 is an equidigital number, since it uses as much as digits as its factorization.

31948351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 31948351 is about 5652.2872361549. The cubic root of 31948351 is about 317.3093107546.

The spelling of 31948351 in words is "thirty-one million, nine hundred forty-eight thousand, three hundred fifty-one".