11321951 has 2 divisors, whose sum is σ = 11321952. Its totient is φ = 11321950.

The previous prime is 11321927. The next prime is 11321993. The reversal of 11321951 is 15912311.

It is a weak prime.

It is an emirp because it is prime and its reverse (15912311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11321951 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321251) 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, 5660975 + 5660976.

It is an arithmetic number, because the mean of its divisors is an integer number (5660976).

Almost surely, 2^11321951 is an apocalyptic number.

11321951 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321951 is an equidigital number, since it uses as much as digits as its factorization.

11321951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 23.

The square root of 11321951 is about 3364.8106930405. The cubic root of 11321951 is about 224.5469137395.

The spelling of 11321951 in words is "eleven million, three hundred twenty-one thousand, nine hundred fifty-one".