215723622012 has 24 divisors (see below), whose sum is σ = 503550364800. Its totient is φ = 71879981616.

The previous prime is 215723622011. The next prime is 215723622029. The reversal of 215723622012 is 210226327512.

215723622012 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 (215723622011) 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, 3454312 + ... + 3516207.

It is an arithmetic number, because the mean of its divisors is an integer number (20981265200).

Almost surely, 2^215723622012 is an apocalyptic number.

It is an amenable number.

215723622012 is an abundant number, since it is smaller than the sum of its proper divisors (287826742788).

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

215723622012 is a wasteful number, since it uses less digits than its factorization.

215723622012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973105 (or 6973103 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 215723622012 its reverse (210226327512), we get a palindrome (425949949524).

The spelling of 215723622012 in words is "two hundred fifteen billion, seven hundred twenty-three million, six hundred twenty-two thousand, twelve".