212528438 has 4 divisors (see below), whose sum is σ = 318792660. Its totient is φ = 106264218.

The previous prime is 212528417. The next prime is 212528447. The reversal of 212528438 is 834825212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 212528398 and 212528407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53132108 + ... + 53132111.

It is an arithmetic number, because the mean of its divisors is an integer number (79698165).

Almost surely, 2^212528438 is an apocalyptic number.

212528438 is a deficient number, since it is larger than the sum of its proper divisors (106264222).

212528438 is a wasteful number, since it uses less digits than its factorization.

212528438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106264221.

The product of its digits is 30720, while the sum is 35.

The square root of 212528438 is about 14578.3551198343. The cubic root of 212528438 is about 596.7682145998.

The spelling of 212528438 in words is "two hundred twelve million, five hundred twenty-eight thousand, four hundred thirty-eight".