212762081 has 4 divisors (see below), whose sum is σ = 243156672. Its totient is φ = 182367492.

The previous prime is 212762059. The next prime is 212762093. The reversal of 212762081 is 180267212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212762081 is a prime.

It is a super-2 number, since 2×212762081² = 90535406222901122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212762281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15197285 + ... + 15197298.

It is an arithmetic number, because the mean of its divisors is an integer number (60789168).

Almost surely, 2^212762081 is an apocalyptic number.

It is an amenable number.

212762081 is a deficient number, since it is larger than the sum of its proper divisors (30394591).

212762081 is an equidigital number, since it uses as much as digits as its factorization.

212762081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30394590.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 212762081 is about 14586.3662712822. The cubic root of 212762081 is about 596.9868200942.

The spelling of 212762081 in words is "two hundred twelve million, seven hundred sixty-two thousand, eighty-one".