212801240 has 32 divisors (see below), whose sum is σ = 506969280. Its totient is φ = 80113152.

The previous prime is 212801233. The next prime is 212801249. The reversal of 212801240 is 42108212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212801249) 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, 155792 + ... + 157151.

It is an arithmetic number, because the mean of its divisors is an integer number (15842790).

Almost surely, 2^212801240 is an apocalyptic number.

212801240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212801240 is an abundant number, since it is smaller than the sum of its proper divisors (294168040).

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

212801240 is a wasteful number, since it uses less digits than its factorization.

212801240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312971 (or 312967 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 212801240 is about 14587.7085246450. The cubic root of 212801240 is about 597.0234431189.

Adding to 212801240 its reverse (42108212), we get a palindrome (254909452).

The spelling of 212801240 in words is "two hundred twelve million, eight hundred one thousand, two hundred forty".