212232445 has 16 divisors (see below), whose sum is σ = 257951232. Its totient is φ = 167618880.

The previous prime is 212232439. The next prime is 212232491. The reversal of 212232445 is 544232212.

It is not a de Polignac number, because 212232445 - 2¹⁵ = 212199677 is a prime.

It is a super-2 number, since 2×212232445² = 90085221421356050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145339 + ... + 146791.

It is an arithmetic number, because the mean of its divisors is an integer number (16121952).

Almost surely, 2^212232445 is an apocalyptic number.

It is an amenable number.

212232445 is a deficient number, since it is larger than the sum of its proper divisors (45718787).

212232445 is a wasteful number, since it uses less digits than its factorization.

212232445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812.

The product of its digits is 3840, while the sum is 25.

The square root of 212232445 is about 14568.1997858349. The cubic root of 212232445 is about 596.4910418406.

Adding to 212232445 its reverse (544232212), we get a palindrome (756464657).

The spelling of 212232445 in words is "two hundred twelve million, two hundred thirty-two thousand, four hundred forty-five".