31487384357 has 12 divisors (see below), whose sum is σ = 37272417420. Its totient is φ = 26422978560.

The previous prime is 31487384351. The next prime is 31487384363. The reversal of 31487384357 is 75348378413.

It is an interprime number because it is at equal distance from previous prime (31487384351) and next prime (31487384363).

It can be written as a sum of positive squares in 2 ways, for example, as 11457775681 + 20029608676 = 107041^2 + 141526^2 .

It is not a de Polignac number, because 31487384357 - 2⁸ = 31487384101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31487384299 and 31487384308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31487384351) 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 11 ways as a sum of consecutive naturals, for example, 10007132 + ... + 10010277.

It is an arithmetic number, because the mean of its divisors is an integer number (3106034785).

Almost surely, 2^31487384357 is an apocalyptic number.

It is an amenable number.

31487384357 is a deficient number, since it is larger than the sum of its proper divisors (5785033063).

31487384357 is a wasteful number, since it uses less digits than its factorization.

31487384357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20017444 (or 20017433 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 53.

The spelling of 31487384357 in words is "thirty-one billion, four hundred eighty-seven million, three hundred eighty-four thousand, three hundred fifty-seven".