11215951 has 2 divisors, whose sum is σ = 11215952. Its totient is φ = 11215950.

The previous prime is 11215933. The next prime is 11215969. The reversal of 11215951 is 15951211.

It is a happy number.

11215951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (11215933) and next prime (11215969).

It is an emirp because it is prime and its reverse (15951211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11215951 - 2⁷ = 11215823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11215931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607975 + 5607976.

It is an arithmetic number, because the mean of its divisors is an integer number (5607976).

Almost surely, 2^11215951 is an apocalyptic number.

11215951 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215951 is an equidigital number, since it uses as much as digits as its factorization.

11215951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 25.

The square root of 11215951 is about 3349.0223946698. The cubic root of 11215951 is about 223.8439535519.

The spelling of 11215951 in words is "eleven million, two hundred fifteen thousand, nine hundred fifty-one".