501161011 has 4 divisors (see below), whose sum is σ = 539711872. Its totient is φ = 462610152.

The previous prime is 501160991. The next prime is 501161029. The reversal of 501161011 is 110161105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 501161011 - 2⁷ = 501160883 is a prime.

It is a super-3 number, since 3×501161011³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501165011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19275411 + ... + 19275436.

It is an arithmetic number, because the mean of its divisors is an integer number (134927968).

Almost surely, 2^501161011 is an apocalyptic number.

501161011 is a deficient number, since it is larger than the sum of its proper divisors (38550861).

501161011 is a wasteful number, since it uses less digits than its factorization.

501161011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38550860.

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 501161011 is about 22386.6257171553. The cubic root of 501161011 is about 794.3143811282.

The spelling of 501161011 in words is "five hundred one million, one hundred sixty-one thousand, eleven".