30002381 has 2 divisors, whose sum is σ = 30002382. Its totient is φ = 30002380.

The previous prime is 30002351. The next prime is 30002393. The reversal of 30002381 is 18320003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 12075625 = 4234^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30002381 is a prime.

It is a super-2 number, since 2×30002381² = 1800285731338322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30002351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15001190 + 15001191.

It is an arithmetic number, because the mean of its divisors is an integer number (15001191).

Almost surely, 2^30002381 is an apocalyptic number.

It is an amenable number.

30002381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30002381 is an equidigital number, since it uses as much as digits as its factorization.

30002381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 30002381 is about 5477.4429253074. The cubic root of 30002381 is about 310.7314707341.

Adding to 30002381 its reverse (18320003), we get a palindrome (48322384).

The spelling of 30002381 in words is "thirty million, two thousand, three hundred eighty-one".