212755420 has 12 divisors (see below), whose sum is σ = 446786424. Its totient is φ = 85102160.

The previous prime is 212755399. The next prime is 212755421. The reversal of 212755420 is 24557212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212755421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5318866 + ... + 5318905.

It is an arithmetic number, because the mean of its divisors is an integer number (37232202).

Almost surely, 2^212755420 is an apocalyptic number.

212755420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212755420 is an abundant number, since it is smaller than the sum of its proper divisors (234031004).

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

212755420 is a wasteful number, since it uses less digits than its factorization.

212755420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10637780 (or 10637778 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 212755420 is about 14586.1379398386. The cubic root of 212755420 is about 596.9805900199.

The spelling of 212755420 in words is "two hundred twelve million, seven hundred fifty-five thousand, four hundred twenty".