51251022330 has 16 divisors (see below), whose sum is σ = 123002453664. Its totient is φ = 13666939280.

The previous prime is 51251022311. The next prime is 51251022331. The reversal of 51251022330 is 3322015215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51251022330.

It is not an unprimeable number, because it can be changed into a prime (51251022331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854183676 + ... + 854183735.

It is an arithmetic number, because the mean of its divisors is an integer number (7687653354).

Almost surely, 2^51251022330 is an apocalyptic number.

51251022330 is an abundant number, since it is smaller than the sum of its proper divisors (71751431334).

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

51251022330 is a wasteful number, since it uses less digits than its factorization.

51251022330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708367421.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 51251022330 its reverse (3322015215), we get a palindrome (54573037545).

The spelling of 51251022330 in words is "fifty-one billion, two hundred fifty-one million, twenty-two thousand, three hundred thirty".