212420551 has 8 divisors (see below), whose sum is σ = 255543680. Its totient is φ = 172491768.

The previous prime is 212420543. The next prime is 212420567. The reversal of 212420551 is 155024212.

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

It is a cyclic number.

It is not a de Polignac number, because 212420551 - 2³ = 212420543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212420501) 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, 798441 + ... + 798706.

It is an arithmetic number, because the mean of its divisors is an integer number (31942960).

Almost surely, 2^212420551 is an apocalyptic number.

212420551 is a deficient number, since it is larger than the sum of its proper divisors (43123129).

212420551 is a wasteful number, since it uses less digits than its factorization.

212420551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597173.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212420551 is about 14574.6544041360. The cubic root of 212420551 is about 596.6672172455.

Adding to 212420551 its reverse (155024212), we get a palindrome (367444763).

The spelling of 212420551 in words is "two hundred twelve million, four hundred twenty thousand, five hundred fifty-one".