212601664 has 28 divisors (see below), whose sum is σ = 460235808. Its totient is φ = 96636800.

The previous prime is 212601661. The next prime is 212601691. The reversal of 212601664 is 466106212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212601661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150292 + ... + 151699.

Almost surely, 2^212601664 is an apocalyptic number.

It is an amenable number.

212601664 is an abundant number, since it is smaller than the sum of its proper divisors (247634144).

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

212601664 is a wasteful number, since it uses less digits than its factorization.

212601664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302014 (or 302004 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 212601664 is about 14580.8663665778. The cubic root of 212601664 is about 596.8367449290.

Adding to 212601664 its reverse (466106212), we get a palindrome (678707876).

The spelling of 212601664 in words is "two hundred twelve million, six hundred one thousand, six hundred sixty-four".