5251422780 has 120 divisors (see below), whose sum is σ = 16593136560. Its totient is φ = 1390245120.

The previous prime is 5251422779. The next prime is 5251422793. The reversal of 5251422780 is 872241525.

It is a happy number.

5251422780 is a `hidden beast` number, since 52 + 514 + 22 + 78 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 213520 + ... + 236840.

It is an arithmetic number, because the mean of its divisors is an integer number (138276138).

Almost surely, 2^5251422780 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 5251422780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8296568280).

5251422780 is an abundant number, since it is smaller than the sum of its proper divisors (11341713780).

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

5251422780 is a wasteful number, since it uses less digits than its factorization.

5251422780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23481 (or 23470 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 5251422780 is about 72466.7011806112. The cubic root of 5251422780 is about 1738.1703121097.

The spelling of 5251422780 in words is "five billion, two hundred fifty-one million, four hundred twenty-two thousand, seven hundred eighty".