7131330 has 96 divisors (see below), whose sum is σ = 20217600. Its totient is φ = 1737216.

The previous prime is 7131329. The next prime is 7131337. The reversal of 7131330 is 331317.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (7131337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90231 + ... + 90309.

It is an arithmetic number, because the mean of its divisors is an integer number (210600).

Almost surely, 2^7131330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7131330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10108800).

7131330 is an abundant number, since it is smaller than the sum of its proper divisors (13086270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7131330 is a wasteful number, since it uses less digits than its factorization.

7131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 189, while the sum is 18.

The square root of 7131330 is about 2670.4550174081. The cubic root of 7131330 is about 192.4820245204.

Adding to 7131330 its reverse (331317), we get a palindrome (7462647).

The spelling of 7131330 in words is "seven million, one hundred thirty-one thousand, three hundred thirty".