212905500 has 48 divisors (see below), whose sum is σ = 619985184. Its totient is φ = 56774400.

The previous prime is 212905481. The next prime is 212905519. The reversal of 212905500 is 5509212.

It is an interprime number because it is at equal distance from previous prime (212905481) and next prime (212905519).

It is a congruent number.

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, 69469 + ... + 72468.

It is an arithmetic number, because the mean of its divisors is an integer number (12916358).

Almost surely, 2^212905500 is an apocalyptic number.

212905500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212905500 is an abundant number, since it is smaller than the sum of its proper divisors (407079684).

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

212905500 is a wasteful number, since it uses less digits than its factorization.

212905500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141959 (or 141947 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 212905500 is about 14591.2816435021. The cubic root of 212905500 is about 597.1209292385.

The spelling of 212905500 in words is "two hundred twelve million, nine hundred five thousand, five hundred".