11131554 has 16 divisors (see below), whose sum is σ = 25443648. Its totient is φ = 3180432.

The previous prime is 11131553. The next prime is 11131559. The reversal of 11131554 is 45513111.

It is a happy number.

11131554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11131554² = 247822988909832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 11131554.

It is not an unprimeable number, because it can be changed into a prime (11131553) 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, 132477 + ... + 132560.

It is an arithmetic number, because the mean of its divisors is an integer number (1590228).

Almost surely, 2^11131554 is an apocalyptic number.

11131554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11131554 is an abundant number, since it is smaller than the sum of its proper divisors (14312094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11131554 is a wasteful number, since it uses less digits than its factorization.

11131554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265049.

The product of its digits is 300, while the sum is 21.

The square root of 11131554 is about 3336.3983575107. The cubic root of 11131554 is about 223.2810842848.

Adding to 11131554 its reverse (45513111), we get a palindrome (56644665).

The spelling of 11131554 in words is "eleven million, one hundred thirty-one thousand, five hundred fifty-four".