31332493 has 4 divisors (see below), whose sum is σ = 31349340. Its totient is φ = 31315648.

The previous prime is 31332491. The next prime is 31332517. The reversal of 31332493 is 39423313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8311689 + 23020804 = 2883^2 + 4798^2 .

It is a cyclic number.

It is not a de Polignac number, because 31332493 - 2¹ = 31332491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31332491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5230 + ... + 9487.

It is an arithmetic number, because the mean of its divisors is an integer number (7837335).

Almost surely, 2^31332493 is an apocalyptic number.

It is an amenable number.

31332493 is a deficient number, since it is larger than the sum of its proper divisors (16847).

31332493 is a wasteful number, since it uses less digits than its factorization.

31332493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16846.

The product of its digits is 5832, while the sum is 28.

The square root of 31332493 is about 5597.5434790629. The cubic root of 31332493 is about 315.2571780639.

The spelling of 31332493 in words is "thirty-one million, three hundred thirty-two thousand, four hundred ninety-three".