31963481 has 12 divisors (see below), whose sum is σ = 36348900. Its totient is φ = 28052640.

The previous prime is 31963411. The next prime is 31963483. The reversal of 31963481 is 18436913.

It can be written as a sum of positive squares in 2 ways, for example, as 9486400 + 22477081 = 3080^2 + 4741^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31963481 is a prime.

It is a super-2 number, since 2×31963481² = 2043328235274722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31963483) 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, 1046 + ... + 8063.

It is an arithmetic number, because the mean of its divisors is an integer number (3029075).

Almost surely, 2^31963481 is an apocalyptic number.

It is an amenable number.

31963481 is a deficient number, since it is larger than the sum of its proper divisors (4385419).

31963481 is a wasteful number, since it uses less digits than its factorization.

31963481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160 (or 9149 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 31963481 is about 5653.6254739769. The cubic root of 31963481 is about 317.3593929660.

The spelling of 31963481 in words is "thirty-one million, nine hundred sixty-three thousand, four hundred eighty-one".