3211311987 has 20 divisors (see below), whose sum is σ = 5166157920. Its totient is φ = 1976191344.

The previous prime is 3211311949. The next prime is 3211312009. The reversal of 3211311987 is 7891131123.

It is a de Polignac number, because none of the positive numbers 2^k-3211311987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3211311947) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1523787 + ... + 1525892.

It is an arithmetic number, because the mean of its divisors is an integer number (258307896).

Almost surely, 2^3211311987 is an apocalyptic number.

3211311987 is a deficient number, since it is larger than the sum of its proper divisors (1954845933).

3211311987 is a wasteful number, since it uses less digits than its factorization.

3211311987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049704 (or 3049695 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 3211311987 is about 56668.4390732619. The cubic root of 3211311987 is about 1475.3469622544.

It can be divided in two parts, 32113 and 11987, that added together give a square (44100 = 210²).

The spelling of 3211311987 in words is "three billion, two hundred eleven million, three hundred eleven thousand, nine hundred eighty-seven".