51010055000 has 80 divisors (see below), whose sum is σ = 119897308080. Its totient is φ = 20339024000.

The previous prime is 51010054999. The next prime is 51010055053. The reversal of 51010055000 is 55001015.

It is a super-2 number, since 2×51010055000² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51010055000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1568909 + ... + 1601091.

It is an arithmetic number, because the mean of its divisors is an integer number (1498716351).

Almost surely, 2^51010055000 is an apocalyptic number.

51010055000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51010055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59948654040).

51010055000 is an abundant number, since it is smaller than the sum of its proper divisors (68887253080).

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

51010055000 is a wasteful number, since it uses less digits than its factorization.

51010055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32526 (or 32507 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

Adding to 51010055000 its reverse (55001015), we get a palindrome (51065056015).

The spelling of 51010055000 in words is "fifty-one billion, ten million, fifty-five thousand".