51000151020 has 288 divisors, whose sum is σ = 180659340288. Its totient is φ = 10468113408.

The previous prime is 51000151009. The next prime is 51000151039. The reversal of 51000151020 is 2015100015.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7471329 + ... + 7478151.

It is an arithmetic number, because the mean of its divisors is an integer number (627289376).

Almost surely, 2^51000151020 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 51000151020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90329670144).

51000151020 is an abundant number, since it is smaller than the sum of its proper divisors (129659189268).

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

51000151020 is a wasteful number, since it uses less digits than its factorization.

51000151020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929 (or 6890 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

Adding to 51000151020 its reverse (2015100015), we get a palindrome (53015251035).

The spelling of 51000151020 in words is "fifty-one billion, one hundred fifty-one thousand, twenty".