31980158 has 24 divisors (see below), whose sum is σ = 56672496. Its totient is φ = 13258080.

The previous prime is 31980121. The next prime is 31980167. The reversal of 31980158 is 85108913.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 12266 + ... + 14642.

It is an arithmetic number, because the mean of its divisors is an integer number (2361354).

Almost surely, 2^31980158 is an apocalyptic number.

31980158 is a deficient number, since it is larger than the sum of its proper divisors (24692338).

31980158 is a wasteful number, since it uses less digits than its factorization.

31980158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 31980158 is about 5655.1001759474. The cubic root of 31980158 is about 317.4145776353.

The spelling of 31980158 in words is "thirty-one million, nine hundred eighty thousand, one hundred fifty-eight".