30011881 has 2 divisors, whose sum is σ = 30011882. Its totient is φ = 30011880.

The previous prime is 30011843. The next prime is 30011909. The reversal of 30011881 is 18811003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 10342656 = 4435^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 30011881 - 2⁹ = 30011369 is a prime.

It is a super-2 number, since 2×30011881² = 1801426002316322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30011801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15005940 + 15005941.

It is an arithmetic number, because the mean of its divisors is an integer number (15005941).

Almost surely, 2^30011881 is an apocalyptic number.

It is an amenable number.

30011881 is a deficient number, since it is larger than the sum of its proper divisors (1).

30011881 is an equidigital number, since it uses as much as digits as its factorization.

30011881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 30011881 is about 5478.3100496412. The cubic root of 30011881 is about 310.7642641032.

Adding to 30011881 its reverse (18811003), we get a palindrome (48822884).

The spelling of 30011881 in words is "thirty million, eleven thousand, eight hundred eighty-one".