11431553 has 6 divisors (see below), whose sum is σ = 13297986. Its totient is φ = 9798432.

The previous prime is 11431549. The next prime is 11431561. The reversal of 11431553 is 35513411.

11431553 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11336689 + 94864 = 3367^2 + 308^2 .

It is not a de Polignac number, because 11431553 - 2² = 11431549 is a prime.

It is a Duffinian number.

11431553 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (11431573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116600 + ... + 116697.

It is an arithmetic number, because the mean of its divisors is an integer number (2216331).

Almost surely, 2^11431553 is an apocalyptic number.

It is an amenable number.

11431553 is a deficient number, since it is larger than the sum of its proper divisors (1866433).

11431553 is an equidigital number, since it uses as much as digits as its factorization.

11431553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233311 (or 233304 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 11431553 is about 3381.0579705175. The cubic root of 11431553 is about 225.2691626518.

Adding to 11431553 its reverse (35513411), we get a palindrome (46944964).

The spelling of 11431553 in words is "eleven million, four hundred thirty-one thousand, five hundred fifty-three".