31521552133 has 8 divisors (see below), whose sum is σ = 33845843520. Its totient is φ = 29249492160.

The previous prime is 31521552107. The next prime is 31521552137. The reversal of 31521552133 is 33125512513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31521552133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31521552095 and 31521552104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31521552137) 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 7 ways as a sum of consecutive naturals, for example, 13056603 + ... + 13059016.

It is an arithmetic number, because the mean of its divisors is an integer number (4230730440).

Almost surely, 2^31521552133 is an apocalyptic number.

It is an amenable number.

31521552133 is a deficient number, since it is larger than the sum of its proper divisors (2324291387).

31521552133 is a wasteful number, since it uses less digits than its factorization.

31521552133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26115707.

The product of its digits is 13500, while the sum is 31.

The spelling of 31521552133 in words is "thirty-one billion, five hundred twenty-one million, five hundred fifty-two thousand, one hundred thirty-three".