30313943881 has 27 divisors (see below), whose sum is σ = 33538691271. Its totient is φ = 27386649264.

The previous prime is 30313943833. The next prime is 30313943899. The reversal of 30313943881 is 18834931303.

It is a happy number.

The square root of 30313943881 is 174109.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4484311225 + 25829632656 = 66965^2 + 160716^2 .

It is not a de Polignac number, because 30313943881 - 2⁹ = 30313943369 is a prime.

It is a super-2 number, since 2×30313943881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30313943801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 133541490 + ... + 133541716.

Almost surely, 2^30313943881 is an apocalyptic number.

30313943881 is the 174109-th square number.

30313943881 is the 87055-th centered octagonal number.

It is an amenable number.

30313943881 is a deficient number, since it is larger than the sum of its proper divisors (3224747390).

30313943881 is an frugal number, since it uses more digits than its factorization.

30313943881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 30313943881 in words is "thirty billion, three hundred thirteen million, nine hundred forty-three thousand, eight hundred eighty-one".