212065755 has 16 divisors (see below), whose sum is σ = 370151424. Its totient is φ = 102819680.

The previous prime is 212065753. The next prime is 212065831. The reversal of 212065755 is 557560212.

It is not a de Polignac number, because 212065755 - 2¹ = 212065753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (212065753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642459 + ... + 642788.

It is an arithmetic number, because the mean of its divisors is an integer number (23134464).

Almost surely, 2^212065755 is an apocalyptic number.

212065755 is a deficient number, since it is larger than the sum of its proper divisors (158085669).

212065755 is a wasteful number, since it uses less digits than its factorization.

212065755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285266.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 212065755 is about 14562.4776394678. The cubic root of 212065755 is about 596.3348371125.

The spelling of 212065755 in words is "two hundred twelve million, sixty-five thousand, seven hundred fifty-five".