212506433400 has 48 divisors (see below), whose sum is σ = 658769945400. Its totient is φ = 56668382080.

The previous prime is 212506433357. The next prime is 212506433401. The reversal of 212506433400 is 4334605212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212506433401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177088095 + ... + 177089294.

Almost surely, 2^212506433400 is an apocalyptic number.

212506433400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212506433400 is an abundant number, since it is smaller than the sum of its proper divisors (446263512000).

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

212506433400 is a wasteful number, since it uses less digits than its factorization.

212506433400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354177408 (or 354177399 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 212506433400 in words is "two hundred twelve billion, five hundred six million, four hundred thirty-three thousand, four hundred".