503165121 has 4 divisors (see below), whose sum is σ = 670886832. Its totient is φ = 335443412.

The previous prime is 503165119. The next prime is 503165171. The reversal of 503165121 is 121561305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 503165121 - 2¹ = 503165119 is a prime.

It is a super-3 number, since 3×503165121³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 503165091 and 503165100.

It is not an unprimeable number, because it can be changed into a prime (503165171) 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 3 ways as a sum of consecutive naturals, for example, 83860851 + ... + 83860856.

It is an arithmetic number, because the mean of its divisors is an integer number (167721708).

Almost surely, 2^503165121 is an apocalyptic number.

It is an amenable number.

503165121 is a deficient number, since it is larger than the sum of its proper divisors (167721711).

503165121 is a wasteful number, since it uses less digits than its factorization.

503165121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167721710.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 503165121 is about 22431.3423806958. The cubic root of 503165121 is about 795.3717765906.

The spelling of 503165121 in words is "five hundred three million, one hundred sixty-five thousand, one hundred twenty-one".