312210066 has 48 divisors (see below), whose sum is σ = 769106016. Its totient is φ = 83954304.

The previous prime is 312210053. The next prime is 312210091. The reversal of 312210066 is 660012213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26236 + ... + 36231.

It is an arithmetic number, because the mean of its divisors is an integer number (16023042).

Almost surely, 2^312210066 is an apocalyptic number.

312210066 is an abundant number, since it is smaller than the sum of its proper divisors (456895950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312210066 is a wasteful number, since it uses less digits than its factorization.

312210066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62503 (or 62496 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 312210066 is about 17669.4670547813. The cubic root of 312210066 is about 678.3944720225.

Adding to 312210066 its reverse (660012213), we get a palindrome (972222279).

The spelling of 312210066 in words is "three hundred twelve million, two hundred ten thousand, sixty-six".