30531314521 has 4 divisors (see below), whose sum is σ = 31584118500. Its totient is φ = 29478510544.

The previous prime is 30531314507. The next prime is 30531314549. The reversal of 30531314521 is 12541313503.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14997431296 + 15533883225 = 122464^2 + 124635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30531314521 is a prime.

It is a super-2 number, since 2×30531314521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30531314521.

It is not an unprimeable number, because it can be changed into a prime (30531314221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526401946 + ... + 526402003.

It is an arithmetic number, because the mean of its divisors is an integer number (7896029625).

Almost surely, 2^30531314521 is an apocalyptic number.

It is an amenable number.

30531314521 is a deficient number, since it is larger than the sum of its proper divisors (1052803979).

30531314521 is a wasteful number, since it uses less digits than its factorization.

30531314521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052803978.

The product of its (nonzero) digits is 5400, while the sum is 28.

The spelling of 30531314521 in words is "thirty billion, five hundred thirty-one million, three hundred fourteen thousand, five hundred twenty-one".