212123346 has 16 divisors (see below), whose sum is σ = 424437024. Its totient is φ = 70676064.

The previous prime is 212123341. The next prime is 212123347. The reversal of 212123346 is 643321212.

It is not an unprimeable number, because it can be changed into a prime (212123341) 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, 9510 + ... + 22686.

It is an arithmetic number, because the mean of its divisors is an integer number (26527314).

Almost surely, 2^212123346 is an apocalyptic number.

212123346 is an abundant number, since it is smaller than the sum of its proper divisors (212313678).

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

212123346 is a wasteful number, since it uses less digits than its factorization.

212123346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15865.

The product of its digits is 1728, while the sum is 24.

The square root of 212123346 is about 14564.4548816631. The cubic root of 212123346 is about 596.3888147277.

Adding to 212123346 its reverse (643321212), we get a palindrome (855444558).

The spelling of 212123346 in words is "two hundred twelve million, one hundred twenty-three thousand, three hundred forty-six".