7545231321 has 8 divisors (see below), whose sum is σ = 10082324064. Its totient is φ = 5019146400.

The previous prime is 7545231301. The next prime is 7545231347. The reversal of 7545231321 is 1231325457.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7545231321 - 2¹³ = 7545223129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7545231301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2750355 + ... + 2753096.

It is an arithmetic number, because the mean of its divisors is an integer number (1260290508).

Almost surely, 2^7545231321 is an apocalyptic number.

It is an amenable number.

7545231321 is a deficient number, since it is larger than the sum of its proper divisors (2537092743).

7545231321 is a wasteful number, since it uses less digits than its factorization.

7545231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503911.

The product of its digits is 25200, while the sum is 33.

The square root of 7545231321 is about 86863.2909864691. The cubic root of 7545231321 is about 1961.3609284306.

Adding to 7545231321 its reverse (1231325457), we get a palindrome (8776556778).

The spelling of 7545231321 in words is "seven billion, five hundred forty-five million, two hundred thirty-one thousand, three hundred twenty-one".