11231431 has 2 divisors, whose sum is σ = 11231432.
Its totient is φ = 11231430.
The previous prime is 11231399. The next prime is 11231443. The reversal of 11231431 is 13413211.
11231431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 11231431 - 25 = 11231399 is a prime.
It is a super-2 number, since 2×112314312 = 252290084615522, which contains 22 as substring.
It is a pancake number, because a pancake can be divided into 11231431 parts by 4739 straight cuts.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (11291431) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615715 + 5615716.
It is an arithmetic number, because the mean of its divisors is an integer number (5615716).
Almost surely, 211231431 is an apocalyptic number.
11231431 is a deficient number, since it is larger than the sum of its proper divisors (1).
11231431 is an equidigital number, since it uses as much as digits as its factorization.
11231431 is an evil number, because the sum of its binary digits is even.
The product of its digits is 72, while the sum is 16.
The square root of 11231431 is about 3351.3327199787.
The cubic root of 11231431 is about 223.9468876521.
Adding to 11231431 its reverse (13413211), we get a palindrome (24644642).
The spelling of 11231431 in words is "eleven million, two hundred thirty-one thousand, four hundred thirty-one".