31662043 has 4 divisors (see below), whose sum is σ = 36185200. Its totient is φ = 27138888.

The previous prime is 31662023. The next prime is 31662073. The reversal of 31662043 is 34026613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34026613 = 997 ⋅34129.

It is not a de Polignac number, because 31662043 - 2¹³ = 31653851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31661999 and 31662017.

It is not an unprimeable number, because it can be changed into a prime (31662013) 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, 2261568 + ... + 2261581.

It is an arithmetic number, because the mean of its divisors is an integer number (9046300).

Almost surely, 2^31662043 is an apocalyptic number.

31662043 is a deficient number, since it is larger than the sum of its proper divisors (4523157).

31662043 is an equidigital number, since it uses as much as digits as its factorization.

31662043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523156.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 31662043 is about 5626.9035001500. The cubic root of 31662043 is about 316.3585998735.

Adding to 31662043 its reverse (34026613), we get a palindrome (65688656).

The spelling of 31662043 in words is "thirty-one million, six hundred sixty-two thousand, forty-three".