212055715 has 4 divisors (see below), whose sum is σ = 254466864. Its totient is φ = 169644568.

The previous prime is 212055707. The next prime is 212055721. The reversal of 212055715 is 517550212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212055715 - 2³ = 212055707 is a prime.

It is a super-2 number, since 2×212055715² = 89935252528322450, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21205567 + ... + 21205576.

It is an arithmetic number, because the mean of its divisors is an integer number (63616716).

Almost surely, 2^212055715 is an apocalyptic number.

212055715 is a deficient number, since it is larger than the sum of its proper divisors (42411149).

212055715 is an equidigital number, since it uses as much as digits as its factorization.

212055715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42411148.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 212055715 is about 14562.1329138282. The cubic root of 212055715 is about 596.3254260437.

The spelling of 212055715 in words is "two hundred twelve million, fifty-five thousand, seven hundred fifteen".