51220932480 has 192 divisors, whose sum is σ = 176991562800. Its totient is φ = 13649707008.

The previous prime is 51220932473. The next prime is 51220932481. The reversal of 51220932480 is 8423902215.

It is a happy number.

51220932480 is a `hidden beast` number, since 51 + 2 + 209 + 324 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220932481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15486987 + ... + 15490293.

Almost surely, 2^51220932480 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 51220932480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88495781400).

51220932480 is an abundant number, since it is smaller than the sum of its proper divisors (125770630320).

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

51220932480 is a wasteful number, since it uses less digits than its factorization.

51220932480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6021 (or 6006 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 51220932480 in words is "fifty-one billion, two hundred twenty million, nine hundred thirty-two thousand, four hundred eighty".