212664403 has 12 divisors (see below), whose sum is σ = 246463248. Its totient is φ = 179755200.

The previous prime is 212664401. The next prime is 212664427. The reversal of 212664403 is 304466212.

It is not a de Polignac number, because 212664403 - 2¹ = 212664401 is a prime.

It is a super-2 number, since 2×212664403² = 90452296606692818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212664401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34453 + ... + 40153.

It is an arithmetic number, because the mean of its divisors is an integer number (20538604).

Almost surely, 2^212664403 is an apocalyptic number.

212664403 is a deficient number, since it is larger than the sum of its proper divisors (33798845).

212664403 is an frugal number, since it uses more digits than its factorization.

212664403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5854 (or 5781 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 212664403 is about 14583.0176232493. The cubic root of 212664403 is about 596.8954482290.

The spelling of 212664403 in words is "two hundred twelve million, six hundred sixty-four thousand, four hundred three".