212645424 has 20 divisors (see below), whose sum is σ = 549334136. Its totient is φ = 70881792.

The previous prime is 212645413. The next prime is 212645431. The reversal of 212645424 is 424546212.

It is a junction number, because it is equal to n+sod(n) for n = 212645391 and 212645400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215009 + ... + 2215104.

Almost surely, 2^212645424 is an apocalyptic number.

212645424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212645424 is an abundant number, since it is smaller than the sum of its proper divisors (336688712).

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

212645424 is a wasteful number, since it uses less digits than its factorization.

212645424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430124 (or 4430118 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 212645424 is about 14582.3668860717. The cubic root of 212645424 is about 596.8776912756.

The spelling of 212645424 in words is "two hundred twelve million, six hundred forty-five thousand, four hundred twenty-four".