30140381 has 2 divisors, whose sum is σ = 30140382. Its totient is φ = 30140380.

The previous prime is 30140347. The next prime is 30140387. The reversal of 30140381 is 18304103.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22714756 + 7425625 = 4766^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 30140381 - 2¹⁰ = 30139357 is a prime.

It is a super-2 number, since 2×30140381² = 1816885133650322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30140387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15070190 + 15070191.

It is an arithmetic number, because the mean of its divisors is an integer number (15070191).

Almost surely, 2^30140381 is an apocalyptic number.

It is an amenable number.

30140381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30140381 is an equidigital number, since it uses as much as digits as its factorization.

30140381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 30140381 is about 5490.0255919258. The cubic root of 30140381 is about 311.2071592569.

Adding to 30140381 its reverse (18304103), we get a palindrome (48444484).

The spelling of 30140381 in words is "thirty million, one hundred forty thousand, three hundred eighty-one".