11503422531 has 12 divisors (see below), whose sum is σ = 16632060640. Its totient is φ = 7661561040.

The previous prime is 11503422509. The next prime is 11503422533. The reversal of 11503422531 is 13522430511.

It is not a de Polignac number, because 11503422531 - 2⁶ = 11503422467 is a prime.

It is a super-2 number, since 2×11503422531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11503422495 and 11503422504.

It is not an unprimeable number, because it can be changed into a prime (11503422533) 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, 605740 + ... + 624441.

Almost surely, 2^11503422531 is an apocalyptic number.

11503422531 is a deficient number, since it is larger than the sum of its proper divisors (5128638109).

11503422531 is a wasteful number, since it uses less digits than its factorization.

11503422531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231226 (or 1231223 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 11503422531 in words is "eleven billion, five hundred three million, four hundred twenty-two thousand, five hundred thirty-one".