51513303450 has 96 divisors (see below), whose sum is σ = 146745143424. Its totient is φ = 11714653440.

The previous prime is 51513303437. The next prime is 51513303467. The reversal of 51513303450 is 5430331515.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82332 + ... + 331368.

It is an arithmetic number, because the mean of its divisors is an integer number (1528595244).

Almost surely, 2^51513303450 is an apocalyptic number.

51513303450 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 51513303450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73372571712).

51513303450 is an abundant number, since it is smaller than the sum of its proper divisors (95231839974).

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

51513303450 is a wasteful number, since it uses less digits than its factorization.

51513303450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249256 (or 249251 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 51513303450 its reverse (5430331515), we get a palindrome (56943634965).

The spelling of 51513303450 in words is "fifty-one billion, five hundred thirteen million, three hundred three thousand, four hundred fifty".