11275551 has 16 divisors (see below), whose sum is σ = 19091200. Its totient is φ = 6443064.

The previous prime is 11275547. The next prime is 11275567. The reversal of 11275551 is 15557211.

11275551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11275551 - 2² = 11275547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11275501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29641 + ... + 30018.

It is an arithmetic number, because the mean of its divisors is an integer number (1193200).

Almost surely, 2^11275551 is an apocalyptic number.

11275551 is a deficient number, since it is larger than the sum of its proper divisors (7815649).

11275551 is an equidigital number, since it uses as much as digits as its factorization.

11275551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59675 (or 59669 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 11275551 is about 3357.9087241913. The cubic root of 11275551 is about 224.2397451715.

The spelling of 11275551 in words is "eleven million, two hundred seventy-five thousand, five hundred fifty-one".