31442493 has 4 divisors (see below), whose sum is σ = 41923328. Its totient is φ = 20961660.

The previous prime is 31442491. The next prime is 31442513. The reversal of 31442493 is 39424413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31442493 - 2¹ = 31442491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31442493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240413 + ... + 5240418.

It is an arithmetic number, because the mean of its divisors is an integer number (10480832).

Almost surely, 2^31442493 is an apocalyptic number.

It is an amenable number.

31442493 is a deficient number, since it is larger than the sum of its proper divisors (10480835).

31442493 is a wasteful number, since it uses less digits than its factorization.

31442493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480834.

The product of its digits is 10368, while the sum is 30.

The square root of 31442493 is about 5607.3606090566. The cubic root of 31442493 is about 315.6256750370.

The spelling of 31442493 in words is "thirty-one million, four hundred forty-two thousand, four hundred ninety-three".