212504140 has 48 divisors (see below), whose sum is σ = 453600000. Its totient is φ = 83616192.

The previous prime is 212504081. The next prime is 212504177. The reversal of 212504140 is 41405212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425611 + ... + 426109.

It is an arithmetic number, because the mean of its divisors is an integer number (9450000).

Almost surely, 2^212504140 is an apocalyptic number.

212504140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212504140 is an abundant number, since it is smaller than the sum of its proper divisors (241095860).

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

212504140 is a wasteful number, since it uses less digits than its factorization.

212504140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 212504140 is about 14577.5217372501. The cubic root of 212504140 is about 596.7454712486.

Adding to 212504140 its reverse (41405212), we get a palindrome (253909352).

The spelling of 212504140 in words is "two hundred twelve million, five hundred four thousand, one hundred forty".