212894915491 has 8 divisors (see below), whose sum is σ = 230214277440. Its totient is φ = 196108457088.

The previous prime is 212894915477. The next prime is 212894915539. The reversal of 212894915491 is 194519498212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212894915491 - 2¹⁷ = 212894784419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212894915461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133225056 + ... + 133226653.

It is an arithmetic number, because the mean of its divisors is an integer number (28776784680).

Almost surely, 2^212894915491 is an apocalyptic number.

212894915491 is a deficient number, since it is larger than the sum of its proper divisors (17319361949).

212894915491 is a wasteful number, since it uses less digits than its factorization.

212894915491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266451773.

The product of its digits is 1866240, while the sum is 55.

The spelling of 212894915491 in words is "two hundred twelve billion, eight hundred ninety-four million, nine hundred fifteen thousand, four hundred ninety-one".