31134333220 has 12 divisors (see below), whose sum is σ = 65382099804. Its totient is φ = 12453733280.

The previous prime is 31134333143. The next prime is 31134333227. The reversal of 31134333220 is 2233343113.

It can be written as a sum of positive squares in 2 ways, for example, as 12459470884 + 18674862336 = 111622^2 + 136656^2 .

It is not an unprimeable number, because it can be changed into a prime (31134333227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778358311 + ... + 778358350.

It is an arithmetic number, because the mean of its divisors is an integer number (5448508317).

Almost surely, 2^31134333220 is an apocalyptic number.

It is an amenable number.

31134333220 is an abundant number, since it is smaller than the sum of its proper divisors (34247766584).

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

31134333220 is a wasteful number, since it uses less digits than its factorization.

31134333220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556716670 (or 1556716668 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31134333220 its reverse (2233343113), we get a palindrome (33367676333).

The spelling of 31134333220 in words is "thirty-one billion, one hundred thirty-four million, three hundred thirty-three thousand, two hundred twenty".