31661455241 has 6 divisors (see below), whose sum is σ = 34284297870. Its totient is φ = 29225958528.

The previous prime is 31661455237. The next prime is 31661455247. The reversal of 31661455241 is 14255416613.

It can be written as a sum of positive squares in 3 ways, for example, as 156625225 + 31504830016 = 12515^2 + 177496^2 .

It is not a de Polignac number, because 31661455241 - 2² = 31661455237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31661455195 and 31661455204.

It is not an unprimeable number, because it can be changed into a prime (31661455247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93672776 + ... + 93673113.

It is an arithmetic number, because the mean of its divisors is an integer number (5714049645).

Almost surely, 2^31661455241 is an apocalyptic number.

It is an amenable number.

31661455241 is a deficient number, since it is larger than the sum of its proper divisors (2622842629).

31661455241 is a wasteful number, since it uses less digits than its factorization.

31661455241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187345915 (or 187345902 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The spelling of 31661455241 in words is "thirty-one billion, six hundred sixty-one million, four hundred fifty-five thousand, two hundred forty-one".