501855172 has 48 divisors (see below), whose sum is σ = 1083462912. Its totient is φ = 198069120.

The previous prime is 501855169. The next prime is 501855197. The reversal of 501855172 is 271558105.

It is a super-2 number, since 2×501855172² = 503717227326299168, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 181722 + ... + 184462.

It is an arithmetic number, because the mean of its divisors is an integer number (22572144).

Almost surely, 2^501855172 is an apocalyptic number.

501855172 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501855172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541731456).

501855172 is an abundant number, since it is smaller than the sum of its proper divisors (581607740).

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

501855172 is a wasteful number, since it uses less digits than its factorization.

501855172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268 (or 3266 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 34.

The square root of 501855172 is about 22402.1242742736. The cubic root of 501855172 is about 794.6809484087.

The spelling of 501855172 in words is "five hundred one million, eight hundred fifty-five thousand, one hundred seventy-two".