31135250828 has 48 divisors (see below), whose sum is σ = 63594263040. Its totient is φ = 13187707200.

The previous prime is 31135250761. The next prime is 31135250833. The reversal of 31135250828 is 82805253113.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 31135250791 and 31135250800.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254276 + ... + 356267.

It is an arithmetic number, because the mean of its divisors is an integer number (1324880480).

Almost surely, 2^31135250828 is an apocalyptic number.

31135250828 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

31135250828 is an abundant number, since it is smaller than the sum of its proper divisors (32459012212).

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

31135250828 is a wasteful number, since it uses less digits than its factorization.

31135250828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610638 (or 610636 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 31135250828 in words is "thirty-one billion, one hundred thirty-five million, two hundred fifty thousand, eight hundred twenty-eight".