30451961 has 2 divisors, whose sum is σ = 30451962. Its totient is φ = 30451960.

The previous prime is 30451921. The next prime is 30452027. The reversal of 30451961 is 16915403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27762361 + 2689600 = 5269^2 + 1640^2 .

It is an emirp because it is prime and its reverse (16915403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30451961 - 2¹⁴ = 30435577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30451901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15225980 + 15225981.

It is an arithmetic number, because the mean of its divisors is an integer number (15225981).

Almost surely, 2^30451961 is an apocalyptic number.

It is an amenable number.

30451961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30451961 is an equidigital number, since it uses as much as digits as its factorization.

30451961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 30451961 is about 5518.3295479701. The cubic root of 30451961 is about 312.2758661633.

The spelling of 30451961 in words is "thirty million, four hundred fifty-one thousand, nine hundred sixty-one".