212248276578 has 54 divisors (see below), whose sum is σ = 498026732931. Its totient is φ = 65299343616.

The previous prime is 212248276483. The next prime is 212248276609. The reversal of 212248276578 is 875672842212.

It is a happy number.

212248276578 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 48 + 27 + 6 + 578 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 59400900729 + 152847375849 = 243723^2 + 390957^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=325767.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25405650 + ... + 25414002.

Almost surely, 2^212248276578 is an apocalyptic number.

212248276578 is an abundant number, since it is smaller than the sum of its proper divisors (285778456353).

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

212248276578 is an frugal number, since it uses more digits than its factorization.

212248276578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16740 (or 8371 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

The spelling of 212248276578 in words is "two hundred twelve billion, two hundred forty-eight million, two hundred seventy-six thousand, five hundred seventy-eight".