212542522664 has 8 divisors (see below), whose sum is σ = 398517230010. Its totient is φ = 106271261328.

The previous prime is 212542522663. The next prime is 212542522721. The reversal of 212542522664 is 466225245212.

It can be written as a sum of positive squares in only one way, i.e., 127062305764 + 85480216900 = 356458^2 + 292370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (212542522663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13283907659 + ... + 13283907674.

Almost surely, 2^212542522664 is an apocalyptic number.

It is an amenable number.

212542522664 is a deficient number, since it is larger than the sum of its proper divisors (185974707346).

212542522664 is a wasteful number, since it uses less digits than its factorization.

212542522664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26567815339 (or 26567815335 counting only the distinct ones).

The product of its digits is 460800, while the sum is 41.

Adding to 212542522664 its reverse (466225245212), we get a palindrome (678767767876).

The spelling of 212542522664 in words is "two hundred twelve billion, five hundred forty-two million, five hundred twenty-two thousand, six hundred sixty-four".