212150514665 has 16 divisors (see below), whose sum is σ = 259454880000. Its totient is φ = 166483333632.

The previous prime is 212150514661. The next prime is 212150514691. The reversal of 212150514665 is 566415051212.

It is a cyclic number.

It is not a de Polignac number, because 212150514665 - 2² = 212150514661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212150514661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640040 + ... + 913209.

It is an arithmetic number, because the mean of its divisors is an integer number (16215930000).

Almost surely, 2^212150514665 is an apocalyptic number.

It is an amenable number.

212150514665 is a deficient number, since it is larger than the sum of its proper divisors (47304365335).

212150514665 is a wasteful number, since it uses less digits than its factorization.

212150514665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553776.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 212150514665 its reverse (566415051212), we get a palindrome (778565565877).

The spelling of 212150514665 in words is "two hundred twelve billion, one hundred fifty million, five hundred fourteen thousand, six hundred sixty-five".