212064155 has 8 divisors (see below), whose sum is σ = 254578032. Its totient is φ = 169583968.

The previous prime is 212064143. The next prime is 212064169. The reversal of 212064155 is 551460212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212064155 - 2⁶ = 212064091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8537 + ... + 22293.

It is an arithmetic number, because the mean of its divisors is an integer number (31822254).

Almost surely, 2^212064155 is an apocalyptic number.

212064155 is a deficient number, since it is larger than the sum of its proper divisors (42513877).

212064155 is a wasteful number, since it uses less digits than its factorization.

212064155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16845.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 212064155 is about 14562.4227036575. The cubic root of 212064155 is about 596.3333373605. Note that the first 5 decimals are identical.

The spelling of 212064155 in words is "two hundred twelve million, sixty-four thousand, one hundred fifty-five".