352440310021 has 4 divisors (see below), whose sum is σ = 352453046092. Its totient is φ = 352427573952.

The previous prime is 352440310007. The next prime is 352440310037. The reversal of 352440310021 is 120013044253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120013044253 = 2053 ⋅58457401.

It can be written as a sum of positive squares in 2 ways, for example, as 249215616225 + 103224693796 = 499215^2 + 321286^2 .

It is a cyclic number.

It is not a de Polignac number, because 352440310021 - 2²¹ = 352438212869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (352440310081) 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, 6326436 + ... + 6381901.

It is an arithmetic number, because the mean of its divisors is an integer number (88113261523).

Almost surely, 2^352440310021 is an apocalyptic number.

It is an amenable number.

352440310021 is a deficient number, since it is larger than the sum of its proper divisors (12736071).

352440310021 is a wasteful number, since it uses less digits than its factorization.

352440310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12736070.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 352440310021 its reverse (120013044253), we get a palindrome (472453354274).

The spelling of 352440310021 in words is "three hundred fifty-two billion, four hundred forty million, three hundred ten thousand, twenty-one".