51503230350 has 672 divisors, whose sum is σ = 173570953248. Its totient is φ = 11197440000.

The previous prime is 51503230333. The next prime is 51503230351. The reversal of 51503230350 is 5303230515.

It is a super-2 number, since 2×51503230350² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51503230351) by changing a digit.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 213706230 + ... + 213706470.

It is an arithmetic number, because the mean of its divisors is an integer number (258290109).

Almost surely, 2^51503230350 is an apocalyptic number.

51503230350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51503230350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86785476624).

51503230350 is an abundant number, since it is smaller than the sum of its proper divisors (122067722898).

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

51503230350 is a wasteful number, since it uses less digits than its factorization.

51503230350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

Adding to 51503230350 its reverse (5303230515), we get a palindrome (56806460865).

The spelling of 51503230350 in words is "fifty-one billion, five hundred three million, two hundred thirty thousand, three hundred fifty".