212145700687 has 4 divisors (see below), whose sum is σ = 212836729336. Its totient is φ = 211454672040.

The previous prime is 212145700649. The next prime is 212145700709. The reversal of 212145700687 is 786007541212.

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

It is a cyclic number.

It is not a de Polignac number, because 212145700687 - 2¹⁵ = 212145667919 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 (212145710687) 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, 345513864 + ... + 345514477.

It is an arithmetic number, because the mean of its divisors is an integer number (53209182334).

Almost surely, 2^212145700687 is an apocalyptic number.

212145700687 is a deficient number, since it is larger than the sum of its proper divisors (691028649).

212145700687 is an equidigital number, since it uses as much as digits as its factorization.

212145700687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691028648.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 212145700687 in words is "two hundred twelve billion, one hundred forty-five million, seven hundred thousand, six hundred eighty-seven".