503256506550 has 144 divisors (see below), whose sum is σ = 1452276548352. Its totient is φ = 114995764800.

The previous prime is 503256506537. The next prime is 503256506551. The reversal of 503256506550 is 55605652305.

503256506550 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×503256506550² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503256506551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 31089759 + ... + 31105941.

It is an arithmetic number, because the mean of its divisors is an integer number (10085253808).

Almost surely, 2^503256506550 is an apocalyptic number.

503256506550 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 503256506550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726138274176).

503256506550 is an abundant number, since it is smaller than the sum of its proper divisors (949020041802).

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

503256506550 is a wasteful number, since it uses less digits than its factorization.

503256506550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20443 (or 20431 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 42.

The spelling of 503256506550 in words is "five hundred three billion, two hundred fifty-six million, five hundred six thousand, five hundred fifty".