31001485 has 4 divisors (see below), whose sum is σ = 37201788. Its totient is φ = 24801184.

The previous prime is 31001479. The next prime is 31001497. The reversal of 31001485 is 58410013.

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 4313929 + 26687556 = 2077^2 + 5166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31001485 is a prime.

It is a super-2 number, since 2×31001485² = 1922184144410450, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3100144 + ... + 3100153.

It is an arithmetic number, because the mean of its divisors is an integer number (9300447).

Almost surely, 2^31001485 is an apocalyptic number.

It is an amenable number.

31001485 is a deficient number, since it is larger than the sum of its proper divisors (6200303).

31001485 is an equidigital number, since it uses as much as digits as its factorization.

31001485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200302.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 31001485 is about 5567.8977181698. The cubic root of 31001485 is about 314.1430812346.

Adding to 31001485 its reverse (58410013), we get a palindrome (89411498).

The spelling of 31001485 in words is "thirty-one million, one thousand, four hundred eighty-five".