212663146 has 8 divisors (see below), whose sum is σ = 326775204. Its totient is φ = 103738080.

The previous prime is 212663137. The next prime is 212663147. The reversal of 212663146 is 641366212.

It can be written as a sum of positive squares in 2 ways, for example, as 187553025 + 25110121 = 13695^2 + 5011^2 .

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

It is a super-2 number, since 2×212663146² = 90451227333234632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212663147) 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, 1296645 + ... + 1296808.

Almost surely, 2^212663146 is an apocalyptic number.

212663146 is a deficient number, since it is larger than the sum of its proper divisors (114112058).

212663146 is a wasteful number, since it uses less digits than its factorization.

212663146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593496.

The product of its digits is 10368, while the sum is 31.

The square root of 212663146 is about 14582.9745251098. The cubic root of 212663146 is about 596.8942721992.

The spelling of 212663146 in words is "two hundred twelve million, six hundred sixty-three thousand, one hundred forty-six".