51423121552 has 80 divisors (see below), whose sum is σ = 115476984000. Its totient is φ = 21958110720.

The previous prime is 51423121487. The next prime is 51423121583. The reversal of 51423121552 is 25512132415.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52699 + ... + 324997.

It is an arithmetic number, because the mean of its divisors is an integer number (1443462300).

Almost surely, 2^51423121552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51423121552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57738492000).

51423121552 is an abundant number, since it is smaller than the sum of its proper divisors (64053862448).

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

51423121552 is a wasteful number, since it uses less digits than its factorization.

51423121552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272384 (or 272378 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

Adding to 51423121552 its reverse (25512132415), we get a palindrome (76935253967).

The spelling of 51423121552 in words is "fifty-one billion, four hundred twenty-three million, one hundred twenty-one thousand, five hundred fifty-two".