31133231010 has 256 divisors, whose sum is σ = 103930905600. Its totient is φ = 6466424832.

The previous prime is 31133230939. The next prime is 31133231023. The reversal of 31133231010 is 1013233113.

It is a happy number.

31133231010 is a `hidden beast` number, since 3 + 11 + 332 + 310 + 10 = 666.

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 (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 915064 + ... + 948476.

It is an arithmetic number, because the mean of its divisors is an integer number (405980100).

Almost surely, 2^31133231010 is an apocalyptic number.

31133231010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31133231010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51965452800).

31133231010 is an abundant number, since it is smaller than the sum of its proper divisors (72797674590).

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

31133231010 is a wasteful number, since it uses less digits than its factorization.

31133231010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33482 (or 33476 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31133231010 its reverse (1013233113), we get a palindrome (32146464123).

The spelling of 31133231010 in words is "thirty-one billion, one hundred thirty-three million, two hundred thirty-one thousand, ten".