31650553117 has 4 divisors (see below), whose sum is σ = 31653249660. Its totient is φ = 31647856576.

The previous prime is 31650553093. The next prime is 31650553157. The reversal of 31650553117 is 71135505613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71135505613 = 73 ⋅974458981.

It can be written as a sum of positive squares in 2 ways, for example, as 895565476 + 30754987641 = 29926^2 + 175371^2 .

It is a cyclic number.

It is not a de Polignac number, because 31650553117 - 2¹¹ = 31650551069 is a prime.

It is a super-2 number, since 2×31650553117² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31650553157) 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 3 ways as a sum of consecutive naturals, for example, 1330588 + ... + 1354165.

It is an arithmetic number, because the mean of its divisors is an integer number (7913312415).

Almost surely, 2^31650553117 is an apocalyptic number.

It is an amenable number.

31650553117 is a deficient number, since it is larger than the sum of its proper divisors (2696543).

31650553117 is a wasteful number, since it uses less digits than its factorization.

31650553117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696542.

The product of its (nonzero) digits is 47250, while the sum is 37.

The spelling of 31650553117 in words is "thirty-one billion, six hundred fifty million, five hundred fifty-three thousand, one hundred seventeen".