350520021 has 16 divisors (see below), whose sum is σ = 524334720. Its totient is φ = 231409440.

The previous prime is 350520017. The next prime is 350520043. The reversal of 350520021 is 120025053.

It is a happy number.

It is not a de Polignac number, because 350520021 - 2² = 350520017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 350519976 and 350520003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350520421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60240 + ... + 65801.

It is an arithmetic number, because the mean of its divisors is an integer number (32770920).

Almost surely, 2^350520021 is an apocalyptic number.

It is an amenable number.

350520021 is a deficient number, since it is larger than the sum of its proper divisors (173814699).

350520021 is a wasteful number, since it uses less digits than its factorization.

350520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126153 (or 126147 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 350520021 is about 18722.1799211523. The cubic root of 350520021 is about 705.0787236671.

Adding to 350520021 its reverse (120025053), we get a palindrome (470545074).

The spelling of 350520021 in words is "three hundred fifty million, five hundred twenty thousand, twenty-one".