212145250 has 32 divisors (see below), whose sum is σ = 398361600. Its totient is φ = 84596400.

The previous prime is 212145239. The next prime is 212145259. The reversal of 212145250 is 52541212.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212145259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93631 + ... + 95869.

It is an arithmetic number, because the mean of its divisors is an integer number (12448800).

Almost surely, 2^212145250 is an apocalyptic number.

212145250 is a deficient number, since it is larger than the sum of its proper divisors (186216350).

212145250 is a wasteful number, since it uses less digits than its factorization.

212145250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212145250 is about 14565.2068299767. The cubic root of 212145250 is about 596.4093418585.

Adding to 212145250 its reverse (52541212), we get a palindrome (264686462).

The spelling of 212145250 in words is "two hundred twelve million, one hundred forty-five thousand, two hundred fifty".