212523764 has 6 divisors (see below), whose sum is σ = 371916594. Its totient is φ = 106261880.

The previous prime is 212523763. The next prime is 212523767. The reversal of 212523764 is 467325212.

It can be written as a sum of positive squares in only one way, i.e., 186104164 + 26419600 = 13642^2 + 5140^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212523764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212523763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26565467 + ... + 26565474.

It is an arithmetic number, because the mean of its divisors is an integer number (61986099).

Almost surely, 2^212523764 is an apocalyptic number.

It is an amenable number.

212523764 is a deficient number, since it is larger than the sum of its proper divisors (159392830).

212523764 is a wasteful number, since it uses less digits than its factorization.

212523764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53130945 (or 53130943 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 212523764 is about 14578.1948128018. The cubic root of 212523764 is about 596.7638397891.

Adding to 212523764 its reverse (467325212), we get a palindrome (679848976).

The spelling of 212523764 in words is "two hundred twelve million, five hundred twenty-three thousand, seven hundred sixty-four".