11131431 has 8 divisors (see below), whose sum is σ = 15122160. Its totient is φ = 7280832.

The previous prime is 11131427. The next prime is 11131469. The reversal of 11131431 is 13413111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11131431 - 2² = 11131427 is a prime.

It is a super-2 number, since 2×11131431² = 247817512215522, which contains 22 as substring.

11131431 is a modest number, since divided by 1431 gives 1113 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 11131431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34846 + ... + 35163.

It is an arithmetic number, because the mean of its divisors is an integer number (1890270).

Almost surely, 2^11131431 is an apocalyptic number.

11131431 is a deficient number, since it is larger than the sum of its proper divisors (3990729).

11131431 is an equidigital number, since it uses as much as digits as its factorization.

11131431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70065.

The product of its digits is 36, while the sum is 15.

The square root of 11131431 is about 3336.3799244091. The cubic root of 11131431 is about 223.2802618876.

Adding to 11131431 its reverse (13413111), we get a palindrome (24544542).

The spelling of 11131431 in words is "eleven million, one hundred thirty-one thousand, four hundred thirty-one".