31243120415999 has 8 divisors (see below), whose sum is σ = 31283359265520. Its totient is φ = 31202885566656.

The previous prime is 31243120415993. The next prime is 31243120416007. The reversal of 31243120415999 is 99951402134213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31243120415999 is a prime.

It is a super-2 number, since 2×31243120415999² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31243120415999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243120415993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14791277 + ... + 16771049.

It is an arithmetic number, because the mean of its divisors is an integer number (3910419908190).

Almost surely, 2^{31243120415999} is an apocalyptic number.

31243120415999 is a deficient number, since it is larger than the sum of its proper divisors (40238849521).

31243120415999 is a wasteful number, since it uses less digits than its factorization.

31243120415999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000089.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 31243120415999 in words is "thirty-one trillion, two hundred forty-three billion, one hundred twenty million, four hundred fifteen thousand, nine hundred ninety-nine".