30131953 has 2 divisors, whose sum is σ = 30131954. Its totient is φ = 30131952.

The previous prime is 30131951. The next prime is 30131971. The reversal of 30131953 is 35913103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21233664 + 8898289 = 4608^2 + 2983^2 .

It is an emirp because it is prime and its reverse (35913103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30131953 - 2¹ = 30131951 is a prime.

Together with 30131951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30131951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15065976 + 15065977.

It is an arithmetic number, because the mean of its divisors is an integer number (15065977).

Almost surely, 2^30131953 is an apocalyptic number.

It is an amenable number.

30131953 is a deficient number, since it is larger than the sum of its proper divisors (1).

30131953 is an equidigital number, since it uses as much as digits as its factorization.

30131953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 30131953 is about 5489.2579644247. The cubic root of 30131953 is about 311.1781494660.

The spelling of 30131953 in words is "thirty million, one hundred thirty-one thousand, nine hundred fifty-three".