31101320340 has 72 divisors (see below), whose sum is σ = 96347946240. Its totient is φ = 8117221824.

The previous prime is 31101320339. The next prime is 31101320353. The reversal of 31101320340 is 4302310113.

31101320340 is a `hidden beast` number, since 3 + 1 + 1 + 0 + 1 + 320 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1829680 + ... + 1846599.

It is an arithmetic number, because the mean of its divisors is an integer number (1338165920).

Almost surely, 2^31101320340 is an apocalyptic number.

31101320340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31101320340 is an abundant number, since it is smaller than the sum of its proper divisors (65246625900).

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

31101320340 is a wasteful number, since it uses less digits than its factorization.

31101320340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676341 (or 3676336 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31101320340 its reverse (4302310113), we get a palindrome (35403630453).

The spelling of 31101320340 in words is "thirty-one billion, one hundred one million, three hundred twenty thousand, three hundred forty".