11403031431 has 16 divisors (see below), whose sum is σ = 17459187840. Its totient is φ = 6547194720.

The previous prime is 11403031363. The next prime is 11403031439. The reversal of 11403031431 is 13413030411.

It is not a de Polignac number, because 11403031431 - 2¹¹ = 11403029383 is a prime.

It is a super-2 number, since 2×11403031431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11403031398 and 11403031407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403031439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9092700 + ... + 9093953.

It is an arithmetic number, because the mean of its divisors is an integer number (1091199240).

Almost surely, 2^11403031431 is an apocalyptic number.

11403031431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11403031431 is a deficient number, since it is larger than the sum of its proper divisors (6056156409).

11403031431 is a wasteful number, since it uses less digits than its factorization.

11403031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186686.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 11403031431 its reverse (13413030411), we get a palindrome (24816061842).

The spelling of 11403031431 in words is "eleven billion, four hundred three million, thirty-one thousand, four hundred thirty-one".