11403231 has 12 divisors (see below), whose sum is σ = 17686872. Its totient is φ = 6516048.

The previous prime is 11403221. The next prime is 11403247. The reversal of 11403231 is 13230411.

It is not a de Polignac number, because 11403231 - 2⁷ = 11403103 is a prime.

It is a super-2 number, since 2×11403231² = 260067354478722, 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 11403231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38640 + ... + 38933.

It is an arithmetic number, because the mean of its divisors is an integer number (1473906).

Almost surely, 2^11403231 is an apocalyptic number.

11403231 is a deficient number, since it is larger than the sum of its proper divisors (6283641).

11403231 is an equidigital number, since it uses as much as digits as its factorization.

11403231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77590 (or 77583 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 11403231 is about 3376.8670391355. The cubic root of 11403231 is about 225.0829718683.

Adding to 11403231 its reverse (13230411), we get a palindrome (24633642).

It can be divided in two parts, 1140 and 3231, that added together give a triangular number (4371 = T₉₃).

The spelling of 11403231 in words is "eleven million, four hundred three thousand, two hundred thirty-one".