51211015606 has 8 divisors (see below), whose sum is σ = 78075810864. Its totient is φ = 25185745320.

The previous prime is 51211015591. The next prime is 51211015607. The reversal of 51211015606 is 60651011215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51211015607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209881090 + ... + 209881333.

It is an arithmetic number, because the mean of its divisors is an integer number (9759476358).

Almost surely, 2^51211015606 is an apocalyptic number.

51211015606 is a deficient number, since it is larger than the sum of its proper divisors (26864795258).

51211015606 is a wasteful number, since it uses less digits than its factorization.

51211015606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419762486.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 51211015606 in words is "fifty-one billion, two hundred eleven million, fifteen thousand, six hundred six".