212551420 has 12 divisors (see below), whose sum is σ = 446358024. Its totient is φ = 85020560.

The previous prime is 212551397. The next prime is 212551481. The reversal of 212551420 is 24155212.

It is a super-2 number, since 2×212551420² = 90356212288032800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212551391 and 212551400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5313766 + ... + 5313805.

It is an arithmetic number, because the mean of its divisors is an integer number (37196502).

Almost surely, 2^212551420 is an apocalyptic number.

212551420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212551420 is an abundant number, since it is smaller than the sum of its proper divisors (233806604).

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

212551420 is a wasteful number, since it uses less digits than its factorization.

212551420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10627580 (or 10627578 counting only the distinct ones).

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

The square root of 212551420 is about 14579.1433218828. The cubic root of 212551420 is about 596.7897245570.

The spelling of 212551420 in words is "two hundred twelve million, five hundred fifty-one thousand, four hundred twenty".