31087222016 has 18 divisors (see below), whose sum is σ = 62053010082. Its totient is φ = 15543610880.

The previous prime is 31087221983. The next prime is 31087222043. The reversal of 31087222016 is 61022278013.

It can be written as a sum of positive squares in only one way, i.e., 17238639616 + 13848582400 = 131296^2 + 117680^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60716975 + ... + 60717486.

It is an arithmetic number, because the mean of its divisors is an integer number (3447389449).

Almost surely, 2^31087222016 is an apocalyptic number.

It is an amenable number.

31087222016 is a deficient number, since it is larger than the sum of its proper divisors (30965788066).

31087222016 is an equidigital number, since it uses as much as digits as its factorization.

31087222016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121434477 (or 121434463 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 31087222016 in words is "thirty-one billion, eighty-seven million, two hundred twenty-two thousand, sixteen".