31135354420 has 12 divisors (see below), whose sum is σ = 65384244324. Its totient is φ = 12454141760.

The previous prime is 31135354399. The next prime is 31135354421. The reversal of 31135354420 is 2445353113.

It can be written as a sum of positive squares in 2 ways, for example, as 8033178384 + 23102176036 = 89628^2 + 151994^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31135354421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 778383841 + ... + 778383880.

It is an arithmetic number, because the mean of its divisors is an integer number (5448687027).

Almost surely, 2^31135354420 is an apocalyptic number.

It is an amenable number.

31135354420 is an abundant number, since it is smaller than the sum of its proper divisors (34248889904).

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

31135354420 is a wasteful number, since it uses less digits than its factorization.

31135354420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556767730 (or 1556767728 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 31135354420 in words is "thirty-one billion, one hundred thirty-five million, three hundred fifty-four thousand, four hundred twenty".