350111821 has 8 divisors (see below), whose sum is σ = 371028600. Its totient is φ = 329230848.

The previous prime is 350111767. The next prime is 350111837. The reversal of 350111821 is 128111053.

It can be written as a sum of positive squares in 4 ways, for example, as 185913225 + 164198596 = 13635^2 + 12814^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 350111821 - 2¹³ = 350103629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 350111792 and 350111801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350111621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12705 + ... + 29353.

It is an arithmetic number, because the mean of its divisors is an integer number (46378575).

Almost surely, 2^350111821 is an apocalyptic number.

It is an amenable number.

350111821 is a deficient number, since it is larger than the sum of its proper divisors (20916779).

350111821 is a wasteful number, since it uses less digits than its factorization.

350111821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17903.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 350111821 is about 18711.2752371398. The cubic root of 350111821 is about 704.8049162621.

Adding to 350111821 its reverse (128111053), we get a palindrome (478222874).

The spelling of 350111821 in words is "three hundred fifty million, one hundred eleven thousand, eight hundred twenty-one".