7321640231 has 16 divisors (see below), whose sum is σ = 7557103008. Its totient is φ = 7089062400.

The previous prime is 7321640201. The next prime is 7321640267. The reversal of 7321640231 is 1320461237.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7321640231 - 2⁶ = 7321640167 is a prime.

It is a super-2 number, since 2×7321640231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7321640194 and 7321640203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7321640201) 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 15 ways as a sum of consecutive naturals, for example, 6136571 + ... + 6137763.

It is an arithmetic number, because the mean of its divisors is an integer number (472318938).

Almost surely, 2^7321640231 is an apocalyptic number.

7321640231 is a deficient number, since it is larger than the sum of its proper divisors (235462777).

7321640231 is a wasteful number, since it uses less digits than its factorization.

7321640231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 7321640231 is about 85566.5836118283. The cubic root of 7321640231 is about 1941.7923909315.

The spelling of 7321640231 in words is "seven billion, three hundred twenty-one million, six hundred forty thousand, two hundred thirty-one".