212420351 has 16 divisors (see below), whose sum is σ = 253292928. Its totient is φ = 175586400.

The previous prime is 212420347. The next prime is 212420363. The reversal of 212420351 is 153024212.

It is not a de Polignac number, because 212420351 - 2² = 212420347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212420311) 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 15 ways as a sum of consecutive naturals, for example, 1505 + ... + 20666.

It is an arithmetic number, because the mean of its divisors is an integer number (15830808).

Almost surely, 2^212420351 is an apocalyptic number.

212420351 is a deficient number, since it is larger than the sum of its proper divisors (40872577).

212420351 is a wasteful number, since it uses less digits than its factorization.

212420351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22262.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212420351 is about 14574.6475429082. The cubic root of 212420351 is about 596.6670299857.

Adding to 212420351 its reverse (153024212), we get a palindrome (365444563).

The spelling of 212420351 in words is "two hundred twelve million, four hundred twenty thousand, three hundred fifty-one".