51115053040 has 160 divisors (see below), whose sum is σ = 125078494464. Its totient is φ = 19403550720.

The previous prime is 51115052983. The next prime is 51115053103. The reversal of 51115053040 is 4035051115.

It is a happy number.

It is a super-2 number, since 2×51115053040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51115052996 and 51115053014.

It is a congruent number.

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, 64133922 + ... + 64134718.

Almost surely, 2^51115053040 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 51115053040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62539247232).

51115053040 is an abundant number, since it is smaller than the sum of its proper divisors (73963441424).

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

51115053040 is a wasteful number, since it uses less digits than its factorization.

51115053040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1349 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 51115053040 in words is "fifty-one billion, one hundred fifteen million, fifty-three thousand, forty".