501981086 has 12 divisors (see below), whose sum is σ = 765960792. Its totient is φ = 246733044.

The previous prime is 501981041. The next prime is 501981091. The reversal of 501981086 is 680189105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29090 + ... + 43013.

It is an arithmetic number, because the mean of its divisors is an integer number (63830066).

Almost surely, 2^501981086 is an apocalyptic number.

501981086 is a deficient number, since it is larger than the sum of its proper divisors (263979706).

501981086 is an equidigital number, since it uses as much as digits as its factorization.

501981086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72223 (or 72164 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 501981086 is about 22404.9344118656. The cubic root of 501981086 is about 794.7474038958.

The spelling of 501981086 in words is "five hundred one million, nine hundred eighty-one thousand, eighty-six".