31816858153 has 6 divisors (see below), whose sum is σ = 32876317482. Its totient is φ = 30790506960.

The previous prime is 31816858121. The next prime is 31816858211. The reversal of 31816858153 is 35185861813.

It can be written as a sum of positive squares in only one way, i.e., 28303688169 + 3513169984 = 168237^2 + 59272^2 .

It is not a de Polignac number, because 31816858153 - 2⁵ = 31816858121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31816858097 and 31816858106.

It is not an unprimeable number, because it can be changed into a prime (31816855153) 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 5 ways as a sum of consecutive naturals, for example, 16553076 + ... + 16554997.

It is an arithmetic number, because the mean of its divisors is an integer number (5479386247).

Almost surely, 2^31816858153 is an apocalyptic number.

It is an amenable number.

31816858153 is a deficient number, since it is larger than the sum of its proper divisors (1059459329).

31816858153 is an equidigital number, since it uses as much as digits as its factorization.

31816858153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33108135 (or 33108104 counting only the distinct ones).

The product of its digits is 691200, while the sum is 49.

The spelling of 31816858153 in words is "thirty-one billion, eight hundred sixteen million, eight hundred fifty-eight thousand, one hundred fifty-three".