7320531 has 4 divisors (see below), whose sum is σ = 9760712. Its totient is φ = 4880352.

The previous prime is 7320527. The next prime is 7320541. The reversal of 7320531 is 1350237.

It is a happy number.

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

It is not a de Polignac number, because 7320531 - 2² = 7320527 is a prime.

It is a super-2 number, since 2×7320531² = 107180348243922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7320498 and 7320507.

It is not an unprimeable number, because it can be changed into a prime (7320541) 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, 1220086 + ... + 1220091.

It is an arithmetic number, because the mean of its divisors is an integer number (2440178).

Almost surely, 2^7320531 is an apocalyptic number.

7320531 is a deficient number, since it is larger than the sum of its proper divisors (2440181).

7320531 is a wasteful number, since it uses less digits than its factorization.

7320531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440180.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 7320531 is about 2705.6479815379. The cubic root of 7320531 is about 194.1694325242.

Adding to 7320531 its reverse (1350237), we get a palindrome (8670768).

The spelling of 7320531 in words is "seven million, three hundred twenty thousand, five hundred thirty-one".