31687403143 has 16 divisors (see below), whose sum is σ = 35431312896. Its totient is φ = 28093879840.

The previous prime is 31687403141. The next prime is 31687403191. The reversal of 31687403143 is 34130478613.

It is a cyclic number.

It is not a de Polignac number, because 31687403143 - 2¹ = 31687403141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31687403096 and 31687403105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31687403141) 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 15 ways as a sum of consecutive naturals, for example, 65371 + ... + 260092.

It is an arithmetic number, because the mean of its divisors is an integer number (2214457056).

Almost surely, 2^31687403143 is an apocalyptic number.

31687403143 is a deficient number, since it is larger than the sum of its proper divisors (3743909753).

31687403143 is a wasteful number, since it uses less digits than its factorization.

31687403143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325694.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 31687403143 in words is "thirty-one billion, six hundred eighty-seven million, four hundred three thousand, one hundred forty-three".