31323473280 has 768 divisors, whose sum is σ = 124242854400. Its totient is φ = 7451136000.

The previous prime is 31323473261. The next prime is 31323473339. The reversal of 31323473280 is 8237432313.

31323473280 is a `hidden beast` number, since 3 + 1 + 32 + 347 + 3 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 148452375 + ... + 148452585.

It is an arithmetic number, because the mean of its divisors is an integer number (161774550).

Almost surely, 2^31323473280 is an apocalyptic number.

31323473280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31323473280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62121427200).

31323473280 is an abundant number, since it is smaller than the sum of its proper divisors (92919381120).

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

31323473280 is a wasteful number, since it uses less digits than its factorization.

31323473280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 31323473280 in words is "thirty-one billion, three hundred twenty-three million, four hundred seventy-three thousand, two hundred eighty".