11515451 has 2 divisors, whose sum is σ = 11515452. Its totient is φ = 11515450.

The previous prime is 11515429. The next prime is 11515453. The reversal of 11515451 is 15451511.

It is a strong prime.

It is an emirp because it is prime and its reverse (15451511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11515451 - 2¹⁰ = 11514427 is a prime.

It is a super-2 number, since 2×11515451² = 265211223466802, which contains 22 as substring.

Together with 11515453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11515453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757725 + 5757726.

It is an arithmetic number, because the mean of its divisors is an integer number (5757726).

Almost surely, 2^11515451 is an apocalyptic number.

11515451 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515451 is an equidigital number, since it uses as much as digits as its factorization.

11515451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500, while the sum is 23.

The square root of 11515451 is about 3393.4423525382. The cubic root of 11515451 is about 225.8189154281.

Adding to 11515451 its reverse (15451511), we get a palindrome (26966962).

The spelling of 11515451 in words is "eleven million, five hundred fifteen thousand, four hundred fifty-one".