5173521990 has 256 divisors, whose sum is σ = 15989944320. Its totient is φ = 1041868800.

The previous prime is 5173521953. The next prime is 5173522021. The reversal of 5173521990 is 991253715.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 7995847 + ... + 7996493.

It is an arithmetic number, because the mean of its divisors is an integer number (62460720).

Almost surely, 2^5173521990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5173521990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7994972160).

5173521990 is an abundant number, since it is smaller than the sum of its proper divisors (10816422330).

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

5173521990 is a wasteful number, since it uses less digits than its factorization.

5173521990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 5173521990 is about 71927.1992364502. The cubic root of 5173521990 is about 1729.5326557910.

The spelling of 5173521990 in words is "five billion, one hundred seventy-three million, five hundred twenty-one thousand, nine hundred ninety".