212547290617 has 12 divisors (see below), whose sum is σ = 226104204460. Its totient is φ = 199762166016.

The previous prime is 212547290611. The next prime is 212547290647. The reversal of 212547290617 is 716092745212.

It can be written as a sum of positive squares in 6 ways, for example, as 21756545001 + 190790745616 = 147501^2 + 436796^2 .

It is not a de Polignac number, because 212547290617 - 2²⁷ = 212413072889 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212547290611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313758 + ... + 723559.

Almost surely, 2^212547290617 is an apocalyptic number.

It is an amenable number.

212547290617 is a deficient number, since it is larger than the sum of its proper divisors (13556913843).

212547290617 is a wasteful number, since it uses less digits than its factorization.

212547290617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038060 (or 1038043 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 212547290617 in words is "two hundred twelve billion, five hundred forty-seven million, two hundred ninety thousand, six hundred seventeen".