212400024 has 16 divisors (see below), whose sum is σ = 531000120. Its totient is φ = 70800000.

The previous prime is 212399981. The next prime is 212400037. The reversal of 212400024 is 420004212.

It is a super-2 number, since 2×212400024² = 90227540390401152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212399976 and 212400012.

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, 4424977 + ... + 4425024.

Almost surely, 2^212400024 is an apocalyptic number.

212400024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212400024 is an abundant number, since it is smaller than the sum of its proper divisors (318600096).

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

212400024 is a wasteful number, since it uses less digits than its factorization.

212400024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8850010 (or 8850006 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 212400024 is about 14573.9501851763. The cubic root of 212400024 is about 596.6479972242.

Adding to 212400024 its reverse (420004212), we get a palindrome (632404236).

The spelling of 212400024 in words is "two hundred twelve million, four hundred thousand, twenty-four".