375521333021 has 4 divisors (see below), whose sum is σ = 375522779100. Its totient is φ = 375519886944.

The previous prime is 375521332999. The next prime is 375521333093. The reversal of 375521333021 is 120333125573.

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

It can be written as a sum of positive squares in 2 ways, for example, as 238154736121 + 137366596900 = 488011^2 + 370630^2 .

It is a cyclic number.

It is not a de Polignac number, because 375521333021 - 2¹⁸ = 375521070877 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 (375521338021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214106 + ... + 892683.

It is an arithmetic number, because the mean of its divisors is an integer number (93880694775).

Almost surely, 2^375521333021 is an apocalyptic number.

It is an amenable number.

375521333021 is a deficient number, since it is larger than the sum of its proper divisors (1446079).

375521333021 is a wasteful number, since it uses less digits than its factorization.

375521333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446078.

The product of its (nonzero) digits is 56700, while the sum is 35.

Adding to 375521333021 its reverse (120333125573), we get a palindrome (495854458594).

The spelling of 375521333021 in words is "three hundred seventy-five billion, five hundred twenty-one million, three hundred thirty-three thousand, twenty-one".