7231320731 has 4 divisors (see below), whose sum is σ = 7284104232. Its totient is φ = 7178537232.

The previous prime is 7231320721. The next prime is 7231320743. The reversal of 7231320731 is 1370231327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1370231327 = 577 ⋅2374751.

It is a cyclic number.

It is not a de Polignac number, because 7231320731 - 2⁶ = 7231320667 is a prime.

It is a super-2 number, since 2×7231320731² (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 = 7231320694 and 7231320703.

It is not an unprimeable number, because it can be changed into a prime (7231320721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26391545 + ... + 26391818.

It is an arithmetic number, because the mean of its divisors is an integer number (1821026058).

Almost surely, 2^7231320731 is an apocalyptic number.

7231320731 is a deficient number, since it is larger than the sum of its proper divisors (52783501).

7231320731 is a wasteful number, since it uses less digits than its factorization.

7231320731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52783500.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 7231320731 is about 85037.1726423215. The cubic root of 7231320731 is about 1933.7747034873.

The spelling of 7231320731 in words is "seven billion, two hundred thirty-one million, three hundred twenty thousand, seven hundred thirty-one".