212345044 has 12 divisors (see below), whose sum is σ = 373753044. Its totient is φ = 105558464.

The previous prime is 212345041. The next prime is 212345053. The reversal of 212345044 is 440543212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80784144 + 131560900 = 8988^2 + 11470^2 .

It is a super-2 number, since 2×212345044² = 90180835422723872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212345041) 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, 152737 + ... + 154120.

It is an arithmetic number, because the mean of its divisors is an integer number (31146087).

Almost surely, 2^212345044 is an apocalyptic number.

It is an amenable number.

212345044 is a deficient number, since it is larger than the sum of its proper divisors (161408000).

212345044 is a wasteful number, since it uses less digits than its factorization.

212345044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307034 (or 307032 counting only the distinct ones).

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

The square root of 212345044 is about 14572.0638208869. The cubic root of 212345044 is about 596.5965117659.

Adding to 212345044 its reverse (440543212), we get a palindrome (652888256).

The spelling of 212345044 in words is "two hundred twelve million, three hundred forty-five thousand, forty-four".