211930513284 has 144 divisors (see below), whose sum is σ = 593834649408. Its totient is φ = 58619215872.

The previous prime is 211930513259. The next prime is 211930513303. The reversal of 211930513284 is 482315039112.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2820004 + ... + 2894180.

It is an arithmetic number, because the mean of its divisors is an integer number (4123851732).

Almost surely, 2^211930513284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211930513284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296917324704).

211930513284 is an abundant number, since it is smaller than the sum of its proper divisors (381904136124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211930513284 is a wasteful number, since it uses less digits than its factorization.

211930513284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74354 (or 74345 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 211930513284 in words is "two hundred eleven billion, nine hundred thirty million, five hundred thirteen thousand, two hundred eighty-four".