7331621 has 4 divisors (see below), whose sum is σ = 7998144. Its totient is φ = 6665100.

The previous prime is 7331591. The next prime is 7331627. The reversal of 7331621 is 1261337.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7331621 - 2⁶ = 7331557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7331627) 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, 333245 + ... + 333266.

It is an arithmetic number, because the mean of its divisors is an integer number (1999536).

Almost surely, 2^7331621 is an apocalyptic number.

It is an amenable number.

7331621 is a deficient number, since it is larger than the sum of its proper divisors (666523).

7331621 is a wasteful number, since it uses less digits than its factorization.

7331621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666522.

The product of its digits is 756, while the sum is 23.

The square root of 7331621 is about 2707.6966225927. The cubic root of 7331621 is about 194.2674332723.

Adding to 7331621 its reverse (1261337), we get a palindrome (8592958).

It can be divided in two parts, 73316 and 21, that added together give a palindrome (73337).

The spelling of 7331621 in words is "seven million, three hundred thirty-one thousand, six hundred twenty-one".