51815201406 has 16 divisors (see below), whose sum is σ = 103883782800. Its totient is φ = 17229503808.

The previous prime is 51815201401. The next prime is 51815201429. The reversal of 51815201406 is 60410251815.

51815201406 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 (51815201401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10554841 + ... + 10559748.

It is an arithmetic number, because the mean of its divisors is an integer number (6492736425).

Almost surely, 2^51815201406 is an apocalyptic number.

51815201406 is an abundant number, since it is smaller than the sum of its proper divisors (52068581394).

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

51815201406 is a wasteful number, since it uses less digits than its factorization.

51815201406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21115003.

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 51815201406 in words is "fifty-one billion, eight hundred fifteen million, two hundred one thousand, four hundred six".