11855553 has 8 divisors (see below), whose sum is σ = 15849600. Its totient is φ = 7882608.

The previous prime is 11855551. The next prime is 11855567. The reversal of 11855553 is 35555811.

11855553 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11855553 - 2¹ = 11855551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11855551) 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, 3913 + ... + 6246.

It is an arithmetic number, because the mean of its divisors is an integer number (1981200).

Almost surely, 2^11855553 is an apocalyptic number.

It is an amenable number.

11855553 is a deficient number, since it is larger than the sum of its proper divisors (3994047).

11855553 is a wasteful number, since it uses less digits than its factorization.

11855553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551.

The product of its digits is 15000, while the sum is 33.

The square root of 11855553 is about 3443.1893645282. The cubic root of 11855553 is about 228.0205236988.

The spelling of 11855553 in words is "eleven million, eight hundred fifty-five thousand, five hundred fifty-three".