31761012 has 24 divisors (see below), whose sum is σ = 74200896. Its totient is φ = 10573888.

The previous prime is 31761007. The next prime is 31761013. The reversal of 31761012 is 21016713.

It is a self number, because there is not a number n which added to its sum of digits gives 31761012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31761013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16273 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (3091704).

Almost surely, 2^31761012 is an apocalyptic number.

It is an amenable number.

31761012 is an abundant number, since it is smaller than the sum of its proper divisors (42439884).

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

31761012 is a wasteful number, since it uses less digits than its factorization.

31761012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287 (or 3285 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 31761012 is about 5635.6909070672. The cubic root of 31761012 is about 316.6878808810.

Adding to 31761012 its reverse (21016713), we get a palindrome (52777725).

The spelling of 31761012 in words is "thirty-one million, seven hundred sixty-one thousand, twelve".