51108910381 has 8 divisors (see below), whose sum is σ = 54417640320. Its totient is φ = 47833771968.

The previous prime is 51108910343. The next prime is 51108910387. The reversal of 51108910381 is 18301980115.

51108910381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51108910381 is a prime.

It is a super-2 number, since 2×51108910381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51108910381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51108910387) 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, 8394741 + ... + 8400826.

It is an arithmetic number, because the mean of its divisors is an integer number (6802205040).

Almost surely, 2^51108910381 is an apocalyptic number.

It is an amenable number.

51108910381 is a deficient number, since it is larger than the sum of its proper divisors (3308729939).

51108910381 is a wasteful number, since it uses less digits than its factorization.

51108910381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16795763.

The product of its (nonzero) digits is 8640, while the sum is 37.

The spelling of 51108910381 in words is "fifty-one billion, one hundred eight million, nine hundred ten thousand, three hundred eighty-one".