11551140 has 48 divisors (see below), whose sum is σ = 35938560. Its totient is φ = 3080160.

The previous prime is 11551139. The next prime is 11551147. The reversal of 11551140 is 4115511.

It is a happy number.

11551140 is a `hidden beast` number, since 115 + 511 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11551147) 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, 10156 + ... + 11235.

It is an arithmetic number, because the mean of its divisors is an integer number (748720).

Almost surely, 2^11551140 is an apocalyptic number.

11551140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11551140 is an abundant number, since it is smaller than the sum of its proper divisors (24387420).

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

11551140 is a wasteful number, since it uses less digits than its factorization.

11551140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21409 (or 21401 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 11551140 is about 3398.6968090726. The cubic root of 11551140 is about 226.0519628864.

Adding to 11551140 its reverse (4115511), we get a palindrome (15666651).

The spelling of 11551140 in words is "eleven million, five hundred fifty-one thousand, one hundred forty".