212550540 has 48 divisors (see below), whose sum is σ = 595982688. Its totient is φ = 56600064.

The previous prime is 212550517. The next prime is 212550553. The reversal of 212550540 is 45055212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212550540.

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, 49104 + ... + 53256.

It is an arithmetic number, because the mean of its divisors is an integer number (12416306).

Almost surely, 2^212550540 is an apocalyptic number.

212550540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212550540 is an abundant number, since it is smaller than the sum of its proper divisors (383432148).

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

212550540 is a wasteful number, since it uses less digits than its factorization.

212550540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 212550540 is about 14579.1131417518. The cubic root of 212550540 is about 596.7889009513.

The spelling of 212550540 in words is "two hundred twelve million, five hundred fifty thousand, five hundred forty".