11315551 has 8 divisors (see below), whose sum is σ = 12393360. Its totient is φ = 10267392.

The previous prime is 11315543. The next prime is 11315567. The reversal of 11315551 is 15551311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11315551 - 2³ = 11315543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11315501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6610 + ... + 8143.

It is an arithmetic number, because the mean of its divisors is an integer number (1549170).

Almost surely, 2^11315551 is an apocalyptic number.

11315551 is a deficient number, since it is larger than the sum of its proper divisors (1077809).

11315551 is a wasteful number, since it uses less digits than its factorization.

11315551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14825.

The product of its digits is 375, while the sum is 22.

The square root of 11315551 is about 3363.8595392792. The cubic root of 11315551 is about 224.5045956173.

Adding to 11315551 its reverse (15551311), we get a palindrome (26866862).

The spelling of 11315551 in words is "eleven million, three hundred fifteen thousand, five hundred fifty-one".