212220147 has 8 divisors (see below), whose sum is σ = 284524240. Its totient is φ = 140698080.

The previous prime is 212220143. The next prime is 212220157. The reversal of 212220147 is 741022212.

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

It is not a de Polignac number, because 212220147 - 2² = 212220143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212220143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194872 + ... + 195957.

It is an arithmetic number, because the mean of its divisors is an integer number (35565530).

Almost surely, 2^212220147 is an apocalyptic number.

212220147 is a deficient number, since it is larger than the sum of its proper divisors (72304093).

212220147 is a wasteful number, since it uses less digits than its factorization.

212220147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391013.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 212220147 is about 14567.7776959974. Note that the first 3 decimals coincide. The cubic root of 212220147 is about 596.4795202146.

Adding to 212220147 its reverse (741022212), we get a palindrome (953242359).

The spelling of 212220147 in words is "two hundred twelve million, two hundred twenty thousand, one hundred forty-seven".