212402240 has 56 divisors (see below), whose sum is σ = 527791680. Its totient is φ = 81264128.

The previous prime is 212402231. The next prime is 212402249. The reversal of 212402240 is 42204212.

It is a happy number.

212402240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212402231) and next prime (212402249).

It is a super-2 number, since 2×212402240² = 90229423114035200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212402249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7070 + ... + 21789.

Almost surely, 2^212402240 is an apocalyptic number.

212402240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212402240 is an abundant number, since it is smaller than the sum of its proper divisors (315389440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212402240 is a wasteful number, since it uses less digits than its factorization.

212402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28899 (or 28889 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 212402240 is about 14574.0262110372. The cubic root of 212402240 is about 596.6500721885.

Adding to 212402240 its reverse (42204212), we get a palindrome (254606452).

The spelling of 212402240 in words is "two hundred twelve million, four hundred two thousand, two hundred forty".