51051421740 has 96 divisors (see below), whose sum is σ = 156032868096. Its totient is φ = 12368643840.

The previous prime is 51051421723. The next prime is 51051421763. The reversal of 51051421740 is 4712415015.

51051421740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51051421698 and 51051421707.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114734 + ... + 1159626.

It is an arithmetic number, because the mean of its divisors is an integer number (1625342376).

Almost surely, 2^51051421740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51051421740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78016434048).

51051421740 is an abundant number, since it is smaller than the sum of its proper divisors (104981446356).

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

51051421740 is a wasteful number, since it uses less digits than its factorization.

51051421740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46639 (or 46637 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

Adding to 51051421740 its reverse (4712415015), we get a palindrome (55763836755).

The spelling of 51051421740 in words is "fifty-one billion, fifty-one million, four hundred twenty-one thousand, seven hundred forty".