31486815361 has 8 divisors (see below), whose sum is σ = 32013140264. Its totient is φ = 30960817920.

The previous prime is 31486815359. The next prime is 31486815377. The reversal of 31486815361 is 16351868413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 442225 + 31486373136 = 665^2 + 177444^2 .

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 31486815361 - 2¹ = 31486815359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31486815341) 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, 116011 + ... + 276463.

It is an arithmetic number, because the mean of its divisors is an integer number (4001642533).

Almost surely, 2^31486815361 is an apocalyptic number.

It is an amenable number.

31486815361 is a deficient number, since it is larger than the sum of its proper divisors (526324903).

31486815361 is a wasteful number, since it uses less digits than its factorization.

31486815361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163731.

The product of its digits is 414720, while the sum is 46.

The spelling of 31486815361 in words is "thirty-one billion, four hundred eighty-six million, eight hundred fifteen thousand, three hundred sixty-one".