51223405530 has 48 divisors (see below), whose sum is σ = 135128200032. Its totient is φ = 12417794400.

The previous prime is 51223405511. The next prime is 51223405549. The reversal of 51223405530 is 3550432215.

It is an interprime number because it is at equal distance from previous prime (51223405511) and next prime (51223405549).

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 23 ways as a sum of consecutive naturals, for example, 7051936 + ... + 7059195.

It is an arithmetic number, because the mean of its divisors is an integer number (2815170834).

Almost surely, 2^51223405530 is an apocalyptic number.

51223405530 is an abundant number, since it is smaller than the sum of its proper divisors (83904794502).

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

51223405530 is a wasteful number, since it uses less digits than its factorization.

51223405530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14111163 (or 14111152 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 51223405530 its reverse (3550432215), we get a palindrome (54773837745).

The spelling of 51223405530 in words is "fifty-one billion, two hundred twenty-three million, four hundred five thousand, five hundred thirty".