1031861812 has 12 divisors (see below), whose sum is σ = 1807374016. Its totient is φ = 515469240.

The previous prime is 1031861807. The next prime is 1031861813. The reversal of 1031861812 is 2181681301.

1031861812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031861813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110364 + ... + 119347.

Almost surely, 2^1031861812 is an apocalyptic number.

It is an amenable number.

1031861812 is a deficient number, since it is larger than the sum of its proper divisors (775512204).

1031861812 is a wasteful number, since it uses less digits than its factorization.

1031861812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230838 (or 230836 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1031861812 is about 32122.6059341393. The cubic root of 1031861812 is about 1010.5097619515.

The spelling of 1031861812 in words is "one billion, thirty-one million, eight hundred sixty-one thousand, eight hundred twelve".