31263012 has 54 divisors (see below), whose sum is σ = 86875334. Its totient is φ = 9472320.

The previous prime is 31263007. The next prime is 31263041. The reversal of 31263012 is 21036213.

31263012 is a `hidden beast` number, since 31 + 2 + 630 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30735936 + 527076 = 5544^2 + 726^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 768 + ... + 7944.

Almost surely, 2^31263012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31263012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43437667).

31263012 is an abundant number, since it is smaller than the sum of its proper divisors (55612322).

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

31263012 is a wasteful number, since it uses less digits than its factorization.

31263012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209 (or 7193 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 31263012 is about 5591.3336512857. Note that the first 3 decimals coincide. The cubic root of 31263012 is about 315.0239739879.

Adding to 31263012 its reverse (21036213), we get a palindrome (52299225).

The spelling of 31263012 in words is "thirty-one million, two hundred sixty-three thousand, twelve".