212644546 has 8 divisors (see below), whose sum is σ = 326384784. Its totient is φ = 103849620.

The previous prime is 212644543. The next prime is 212644567. The reversal of 212644546 is 645446212.

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

It is a super-2 number, since 2×212644546² = 90435405887092232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212644543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1236220 + ... + 1236391.

It is an arithmetic number, because the mean of its divisors is an integer number (40798098).

Almost surely, 2^212644546 is an apocalyptic number.

212644546 is a deficient number, since it is larger than the sum of its proper divisors (113740238).

212644546 is a wasteful number, since it uses less digits than its factorization.

212644546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472656.

The product of its digits is 46080, while the sum is 34.

The square root of 212644546 is about 14582.3367811884. The cubic root of 212644546 is about 596.8768697839.

The spelling of 212644546 in words is "two hundred twelve million, six hundred forty-four thousand, five hundred forty-six".