30953381 has 2 divisors, whose sum is σ = 30953382. Its totient is φ = 30953380.

The previous prime is 30953371. The next prime is 30953383. The reversal of 30953381 is 18335903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29430625 + 1522756 = 5425^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 30953381 - 2¹⁰ = 30952357 is a prime.

It is a super-2 number, since 2×30953381² = 1916223590662322, which contains 22 as substring.

Together with 30953383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30953383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15476690 + 15476691.

It is an arithmetic number, because the mean of its divisors is an integer number (15476691).

Almost surely, 2^30953381 is an apocalyptic number.

It is an amenable number.

30953381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30953381 is an equidigital number, since it uses as much as digits as its factorization.

30953381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 30953381 is about 5563.5762778990. The cubic root of 30953381 is about 313.9805152419.

The spelling of 30953381 in words is "thirty million, nine hundred fifty-three thousand, three hundred eighty-one".