31263577221161 has 8 divisors (see below), whose sum is σ = 31308095233800. Its totient is φ = 31219060400640.

The previous prime is 31263577221137. The next prime is 31263577221169. The reversal of 31263577221161 is 16112277536213.

It can be written as a sum of positive squares in 4 ways, for example, as 3331559465536 + 27932017755625 = 1825256^2 + 5285075^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31263577221161 - 2¹⁰ = 31263577220137 is a prime.

It is a super-3 number, since 3×31263577221161³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31263577221169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61208171 + ... + 61716831.

It is an arithmetic number, because the mean of its divisors is an integer number (3913511904225).

Almost surely, 2^{31263577221161} is an apocalyptic number.

It is an amenable number.

31263577221161 is a deficient number, since it is larger than the sum of its proper divisors (44518012639).

31263577221161 is an equidigital number, since it uses as much as digits as its factorization.

31263577221161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596059.

The product of its digits is 635040, while the sum is 47.

The spelling of 31263577221161 in words is "thirty-one trillion, two hundred sixty-three billion, five hundred seventy-seven million, two hundred twenty-one thousand, one hundred sixty-one".