8121433531 has 4 divisors (see below), whose sum is σ = 8124339952. Its totient is φ = 8118527112.

The previous prime is 8121433517. The next prime is 8121433577. The reversal of 8121433531 is 1353341218.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8121433531 - 2⁷ = 8121433403 is a prime.

It is a super-2 number, since 2×8121433531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8121433493 and 8121433502.

It is not an unprimeable number, because it can be changed into a prime (8121433231) 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, 1449015 + ... + 1454608.

It is an arithmetic number, because the mean of its divisors is an integer number (2031084988).

Almost surely, 2^8121433531 is an apocalyptic number.

8121433531 is a deficient number, since it is larger than the sum of its proper divisors (2906421).

8121433531 is a wasteful number, since it uses less digits than its factorization.

8121433531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906420.

The product of its digits is 8640, while the sum is 31.

The square root of 8121433531 is about 90118.9965046216. The cubic root of 8121433531 is about 2010.0686866291.

Adding to 8121433531 its reverse (1353341218), we get a palindrome (9474774749).

The spelling of 8121433531 in words is "eight billion, one hundred twenty-one million, four hundred thirty-three thousand, five hundred thirty-one".