31011012 has 30 divisors (see below), whose sum is σ = 81069758. Its totient is φ = 10336896.

The previous prime is 31011011. The next prime is 31011089. The reversal of 31011012 is 21011013.

It can be written as a sum of positive squares in only one way, i.e., 26873856 + 4137156 = 5184^2 + 2034^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 31010985 and 31011003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011011) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 47533 + ... + 48180.

Almost surely, 2^31011012 is an apocalyptic number.

It is an amenable number.

31011012 is an abundant number, since it is smaller than the sum of its proper divisors (50058746).

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

31011012 is a wasteful number, since it uses less digits than its factorization.

31011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95729 (or 95718 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 31011012 is about 5568.7531818173. The cubic root of 31011012 is about 314.1752574848.

Adding to 31011012 its reverse (21011013), we get a palindrome (52022025).

Subtracting from 31011012 its reverse (21011013), we obtain a palindrome (9999999).

The spelling of 31011012 in words is "thirty-one million, eleven thousand, twelve".