5191321146 has 64 divisors (see below), whose sum is σ = 11915942400. Its totient is φ = 1493105600.

The previous prime is 5191321133. The next prime is 5191321147. The reversal of 5191321146 is 6411231915.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (5191321147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89941 + ... + 135911.

It is an arithmetic number, because the mean of its divisors is an integer number (186186600).

Almost surely, 2^5191321146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5191321146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5957971200).

5191321146 is an abundant number, since it is smaller than the sum of its proper divisors (6724621254).

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

5191321146 is a wasteful number, since it uses less digits than its factorization.

5191321146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46075.

The product of its digits is 6480, while the sum is 33.

The square root of 5191321146 is about 72050.8233540742. The cubic root of 5191321146 is about 1731.5138325887.

The spelling of 5191321146 in words is "five billion, one hundred ninety-one million, three hundred twenty-one thousand, one hundred forty-six".