11005431 has 8 divisors (see below), whose sum is σ = 15312000. Its totient is φ = 7017912.

The previous prime is 11005399. The next prime is 11005433. The reversal of 11005431 is 13450011.

11005431 is digitally balanced in base 3, because in such base 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 11005431 - 2⁵ = 11005399 is a prime.

It is a super-2 number, since 2×11005431² = 242239022991522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11005431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11005433) 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, 79681 + ... + 79818.

It is an arithmetic number, because the mean of its divisors is an integer number (1914000).

Almost surely, 2^11005431 is an apocalyptic number.

11005431 is a deficient number, since it is larger than the sum of its proper divisors (4306569).

11005431 is a wasteful number, since it uses less digits than its factorization.

11005431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159525.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 11005431 is about 3317.4434433762. The cubic root of 11005431 is about 222.4346043557.

Adding to 11005431 its reverse (13450011), we get a palindrome (24455442).

The spelling of 11005431 in words is "eleven million, five thousand, four hundred thirty-one".