31140485 has 8 divisors (see below), whose sum is σ = 37481496. Its totient is φ = 24837120.

The previous prime is 31140469. The next prime is 31140493. The reversal of 31140485 is 58404113.

It can be written as a sum of positive squares in 4 ways, for example, as 6558721 + 24581764 = 2561^2 + 4958^2 .

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

It is not a de Polignac number, because 31140485 - 2⁴ = 31140469 is a prime.

It is a Duffinian number.

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, 7556 + ... + 10925.

It is an arithmetic number, because the mean of its divisors is an integer number (4685187).

Almost surely, 2^31140485 is an apocalyptic number.

It is an amenable number.

31140485 is a deficient number, since it is larger than the sum of its proper divisors (6341011).

31140485 is a wasteful number, since it uses less digits than its factorization.

31140485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18823.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 31140485 is about 5580.3660274215. The cubic root of 31140485 is about 314.6118844701.

Adding to 31140485 its reverse (58404113), we get a palindrome (89544598).

The spelling of 31140485 in words is "thirty-one million, one hundred forty thousand, four hundred eighty-five".