31042085 has 8 divisors (see below), whose sum is σ = 39441816. Its totient is φ = 23372800.

The previous prime is 31042079. The next prime is 31042097. The reversal of 31042085 is 58024013.

It can be written as a sum of positive squares in 4 ways, for example, as 13786369 + 17255716 = 3713^2 + 4154^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31042085 - 2⁶ = 31042021 is a prime.

It is a super-2 number, since 2×31042085² = 1927222082294450, which contains 22 as substring.

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 31042085.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 182516 + ... + 182685.

It is an arithmetic number, because the mean of its divisors is an integer number (4930227).

Almost surely, 2^31042085 is an apocalyptic number.

It is an amenable number.

31042085 is a deficient number, since it is larger than the sum of its proper divisors (8399731).

31042085 is a wasteful number, since it uses less digits than its factorization.

31042085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365223.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 31042085 is about 5571.5424255766. The cubic root of 31042085 is about 314.2801568773.

Adding to 31042085 its reverse (58024013), we get a palindrome (89066098).

The spelling of 31042085 in words is "thirty-one million, forty-two thousand, eighty-five".