11403431 has 4 divisors (see below), whose sum is σ = 12280632. Its totient is φ = 10526232.

The previous prime is 11403391. The next prime is 11403433. The reversal of 11403431 is 13430411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13430411 = 41 ⋅327571.

It is a cyclic number.

It is not a de Polignac number, because 11403431 - 2⁶ = 11403367 is a prime.

It is a super-2 number, since 2×11403431² = 260076477143522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403433) 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, 438581 + ... + 438606.

It is an arithmetic number, because the mean of its divisors is an integer number (3070158).

Almost surely, 2^11403431 is an apocalyptic number.

11403431 is a deficient number, since it is larger than the sum of its proper divisors (877201).

11403431 is an equidigital number, since it uses as much as digits as its factorization.

11403431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877200.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 11403431 is about 3376.8966522534. The cubic root of 11403431 is about 225.0842877624.

Adding to 11403431 its reverse (13430411), we get a palindrome (24833842).

The spelling of 11403431 in words is "eleven million, four hundred three thousand, four hundred thirty-one".