3215471887 has 4 divisors (see below), whose sum is σ = 3228814336. Its totient is φ = 3202129440.

The previous prime is 3215471881. The next prime is 3215471891. The reversal of 3215471887 is 7881745123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7881745123 = 7 ⋅1125963589.

It is a cyclic number.

It is not a de Polignac number, because 3215471887 - 2³ = 3215471879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215471881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6670863 + ... + 6671344.

It is an arithmetic number, because the mean of its divisors is an integer number (807203584).

Almost surely, 2^3215471887 is an apocalyptic number.

3215471887 is a deficient number, since it is larger than the sum of its proper divisors (13342449).

3215471887 is a wasteful number, since it uses less digits than its factorization.

3215471887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13342448.

The product of its digits is 376320, while the sum is 46.

The square root of 3215471887 is about 56705.1310464935. The cubic root of 3215471887 is about 1475.9837370571.

The spelling of 3215471887 in words is "three billion, two hundred fifteen million, four hundred seventy-one thousand, eight hundred eighty-seven".