212052251540 has 24 divisors (see below), whose sum is σ = 445912343520. Its totient is φ = 84706116768.

The previous prime is 212052251539. The next prime is 212052251549. The reversal of 212052251540 is 45152250212.

It is a happy number.

212052251540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212052251549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7158842 + ... + 7188401.

It is an arithmetic number, because the mean of its divisors is an integer number (18579680980).

Almost surely, 2^212052251540 is an apocalyptic number.

212052251540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212052251540 is an abundant number, since it is smaller than the sum of its proper divisors (233860091980).

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

212052251540 is a wasteful number, since it uses less digits than its factorization.

212052251540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14347991 (or 14347989 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 212052251540 in words is "two hundred twelve billion, fifty-two million, two hundred fifty-one thousand, five hundred forty".