31128472113985 has 8 divisors (see below), whose sum is σ = 37354229194176. Its totient is φ = 24902735919600.

The previous prime is 31128472113979. The next prime is 31128472114007. The reversal of 31128472113985 is 58931127482113.

It is a happy number.

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

It is not a de Polignac number, because 31128472113985 - 2¹⁹ = 31128471589697 is a prime.

It is a super-2 number, since 2×31128472113985² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730341 + ... + 8077810.

It is an arithmetic number, because the mean of its divisors is an integer number (4669278649272).

Almost surely, 2^{31128472113985} is an apocalyptic number.

It is an amenable number.

31128472113985 is a deficient number, since it is larger than the sum of its proper divisors (6225757080191).

31128472113985 is an equidigital number, since it uses as much as digits as its factorization.

31128472113985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10442903.

The product of its digits is 2903040, while the sum is 55.

The spelling of 31128472113985 in words is "thirty-one trillion, one hundred twenty-eight billion, four hundred seventy-two million, one hundred thirteen thousand, nine hundred eighty-five".