212087851782 has 32 divisors (see below), whose sum is σ = 431079459840. Its totient is φ = 69549627840.

The previous prime is 212087851739. The next prime is 212087851831. The reversal of 212087851782 is 287158780212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340407 + ... + 734882.

It is an arithmetic number, because the mean of its divisors is an integer number (13471233120).

Almost surely, 2^212087851782 is an apocalyptic number.

212087851782 is an abundant number, since it is smaller than the sum of its proper divisors (218991608058).

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

212087851782 is a wasteful number, since it uses less digits than its factorization.

212087851782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075828.

The product of its (nonzero) digits is 1003520, while the sum is 51.

The spelling of 212087851782 in words is "two hundred twelve billion, eighty-seven million, eight hundred fifty-one thousand, seven hundred eighty-two".