31993119 has 12 divisors (see below), whose sum is σ = 47806200. Its totient is φ = 20593104.

The previous prime is 31993109. The next prime is 31993121. The reversal of 31993119 is 91139913.

It is a de Polignac number, because none of the positive numbers 2^k-31993119 is a prime.

It is a super-2 number, since 2×31993119² = 2047119326696322, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31993109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61029 + ... + 61550.

It is an arithmetic number, because the mean of its divisors is an integer number (3983850).

Almost surely, 2^31993119 is an apocalyptic number.

31993119 is a deficient number, since it is larger than the sum of its proper divisors (15813081).

31993119 is a wasteful number, since it uses less digits than its factorization.

31993119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122614 (or 122611 counting only the distinct ones).

The product of its digits is 6561, while the sum is 36.

The square root of 31993119 is about 5656.2460165732. The cubic root of 31993119 is about 317.4574527069.

The spelling of 31993119 in words is "thirty-one million, nine hundred ninety-three thousand, one hundred nineteen".