212423244040 has 64 divisors (see below), whose sum is σ = 547657666560. Its totient is φ = 72640631040.

The previous prime is 212423243969. The next prime is 212423244139. The reversal of 212423244040 is 40442324212.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883171 + ... + 1097650.

It is an arithmetic number, because the mean of its divisors is an integer number (8557151040).

Almost surely, 2^212423244040 is an apocalyptic number.

212423244040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212423244040 is an abundant number, since it is smaller than the sum of its proper divisors (335234422520).

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

212423244040 is a wasteful number, since it uses less digits than its factorization.

212423244040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981222 (or 1981218 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 212423244040 its reverse (40442324212), we get a palindrome (252865568252).

The spelling of 212423244040 in words is "two hundred twelve billion, four hundred twenty-three million, two hundred forty-four thousand, forty".