332640621 has 8 divisors (see below), whose sum is σ = 492800960. Its totient is φ = 221760396.

The previous prime is 332640617. The next prime is 332640631. The reversal of 332640621 is 126046233.

332640621 is a `hidden beast` number, since 3 + 32 + 6 + 4 + 0 + 621 = 666.

It is not a de Polignac number, because 332640621 - 2² = 332640617 is a prime.

It is a super-2 number, since 2×332640621² = 221299565478531282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 12320023 = 332640621 / (3 + 3 + 2 + 6 + 4 + 0 + 6 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (332640601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6159985 + ... + 6160038.

It is an arithmetic number, because the mean of its divisors is an integer number (61600120).

Almost surely, 2^332640621 is an apocalyptic number.

It is an amenable number.

332640621 is a deficient number, since it is larger than the sum of its proper divisors (160160339).

332640621 is a wasteful number, since it uses less digits than its factorization.

332640621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12320032 (or 12320026 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 332640621 is about 18238.4380087770. The cubic root of 332640621 is about 692.8806413501.

Adding to 332640621 its reverse (126046233), we get a palindrome (458686854).

The spelling of 332640621 in words is "three hundred thirty-two million, six hundred forty thousand, six hundred twenty-one".