31045312 has 56 divisors (see below), whose sum is σ = 65379600. Its totient is φ = 14601216.

The previous prime is 31045307. The next prime is 31045319. The reversal of 31045312 is 21354013.

It is a super-2 number, since 2×31045312² = 1927622794354688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31045312.

It is not an unprimeable number, because it can be changed into a prime (31045319) by changing a digit.

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, 79614 + ... + 80002.

Almost surely, 2^31045312 is an apocalyptic number.

31045312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31045312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32689800).

31045312 is an abundant number, since it is smaller than the sum of its proper divisors (34334288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31045312 is a wasteful number, since it uses less digits than its factorization.

31045312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31045312 is about 5571.8320146968. The cubic root of 31045312 is about 314.2910468989.

Adding to 31045312 its reverse (21354013), we get a palindrome (52399325).

The spelling of 31045312 in words is "thirty-one million, forty-five thousand, three hundred twelve".