7312013281 has 16 divisors (see below), whose sum is σ = 7646662800. Its totient is φ = 6983278848.

The previous prime is 7312013273. The next prime is 7312013341. The reversal of 7312013281 is 1823102137.

It can be written as a sum of positive squares in 8 ways, for example, as 878529600 + 6433483681 = 29640^2 + 80209^2 .

It is a cyclic number.

It is not a de Polignac number, because 7312013281 - 2³ = 7312013273 is a prime.

It is a super-2 number, since 2×7312013281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7312013221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1039131 + ... + 1046143.

It is an arithmetic number, because the mean of its divisors is an integer number (477916425).

Almost surely, 2^7312013281 is an apocalyptic number.

It is an amenable number.

7312013281 is a deficient number, since it is larger than the sum of its proper divisors (334649519).

7312013281 is a wasteful number, since it uses less digits than its factorization.

7312013281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7312013281 is about 85510.3109630646. The cubic root of 7312013281 is about 1940.9409543316.

The spelling of 7312013281 in words is "seven billion, three hundred twelve million, thirteen thousand, two hundred eighty-one".