11481431 has 4 divisors (see below), whose sum is σ = 12364632. Its totient is φ = 10598232.

The previous prime is 11481427. The next prime is 11481451. The reversal of 11481431 is 13418411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13418411 = 113 ⋅118747.

It is a cyclic number.

It is not a de Polignac number, because 11481431 - 2² = 11481427 is a prime.

It is a super-2 number, since 2×11481431² = 263646515615522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11481397 and 11481406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11481401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441581 + ... + 441606.

It is an arithmetic number, because the mean of its divisors is an integer number (3091158).

Almost surely, 2^11481431 is an apocalyptic number.

11481431 is a deficient number, since it is larger than the sum of its proper divisors (883201).

11481431 is an equidigital number, since it uses as much as digits as its factorization.

11481431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883200.

The product of its digits is 384, while the sum is 23.

The square root of 11481431 is about 3388.4260357871. The cubic root of 11481431 is about 225.5963177706.

Adding to 11481431 its reverse (13418411), we get a palindrome (24899842).

The spelling of 11481431 in words is "eleven million, four hundred eighty-one thousand, four hundred thirty-one".