31428646471 has 4 divisors (see below), whose sum is σ = 31433154192. Its totient is φ = 31424138752.

The previous prime is 31428646433. The next prime is 31428646519. The reversal of 31428646471 is 17464682413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31428646471 is a prime.

It is a super-3 number, since 3×31428646471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428640471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2243386 + ... + 2257351.

It is an arithmetic number, because the mean of its divisors is an integer number (7858288548).

Almost surely, 2^31428646471 is an apocalyptic number.

31428646471 is a deficient number, since it is larger than the sum of its proper divisors (4507721).

31428646471 is an equidigital number, since it uses as much as digits as its factorization.

31428646471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507720.

The product of its digits is 774144, while the sum is 46.

The spelling of 31428646471 in words is "thirty-one billion, four hundred twenty-eight million, six hundred forty-six thousand, four hundred seventy-one".