375331021 has 8 divisors (see below), whose sum is σ = 418141080. Its totient is φ = 334512192.

The previous prime is 375331013. The next prime is 375331027. The reversal of 375331021 is 120133573.

It can be written as a sum of positive squares in 4 ways, for example, as 11055625 + 364275396 = 3325^2 + 19086^2 .

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 375331021 - 2³ = 375331013 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 (375331027) 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, 497410 + ... + 498163.

It is an arithmetic number, because the mean of its divisors is an integer number (52267635).

Almost surely, 2^375331021 is an apocalyptic number.

It is an amenable number.

375331021 is a deficient number, since it is larger than the sum of its proper divisors (42810059).

375331021 is a wasteful number, since it uses less digits than its factorization.

375331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995615.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 375331021 is about 19373.4617711962. The cubic root of 375331021 is about 721.3369071488.

Adding to 375331021 its reverse (120133573), we get a palindrome (495464594).

The spelling of 375331021 in words is "three hundred seventy-five million, three hundred thirty-one thousand, twenty-one".