212140330 has 16 divisors (see below), whose sum is σ = 382041000. Its totient is φ = 84814272.

The previous prime is 212140309. The next prime is 212140337. The reversal of 212140330 is 33041212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 127260961 + 84879369 = 11281^2 + 9213^2 .

It is a super-2 number, since 2×212140330² = 90007039225017800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212140337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23632 + ... + 31348.

Almost surely, 2^212140330 is an apocalyptic number.

212140330 is a deficient number, since it is larger than the sum of its proper divisors (169900670).

212140330 is a wasteful number, since it uses less digits than its factorization.

212140330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10473.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212140330 is about 14565.0379333526. The cubic root of 212140330 is about 596.4047312491.

Adding to 212140330 its reverse (33041212), we get a palindrome (245181542).

The spelling of 212140330 in words is "two hundred twelve million, one hundred forty thousand, three hundred thirty".