212747620 has 12 divisors (see below), whose sum is σ = 446770044. Its totient is φ = 85099040.

The previous prime is 212747611. The next prime is 212747627. The reversal of 212747620 is 26747212.

It can be written as a sum of positive squares in 2 ways, for example, as 81324324 + 131423296 = 9018^2 + 11464^2 .

It is not an unprimeable number, because it can be changed into a prime (212747627) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5318671 + ... + 5318710.

It is an arithmetic number, because the mean of its divisors is an integer number (37230837).

Almost surely, 2^212747620 is an apocalyptic number.

212747620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212747620 is an abundant number, since it is smaller than the sum of its proper divisors (234022424).

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

212747620 is a wasteful number, since it uses less digits than its factorization.

212747620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637390 (or 10637388 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 212747620 is about 14585.8705602374. The cubic root of 212747620 is about 596.9732944667.

The spelling of 212747620 in words is "two hundred twelve million, seven hundred forty-seven thousand, six hundred twenty".