11530203031 has 4 divisors (see below), whose sum is σ = 11571236064. Its totient is φ = 11489170000.

The previous prime is 11530202951. The next prime is 11530203073. The reversal of 11530203031 is 13030203511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11530203031 - 2⁷ = 11530202903 is a prime.

It is a super-2 number, since 2×11530203031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11530204031) 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, 20516095 + ... + 20516656.

It is an arithmetic number, because the mean of its divisors is an integer number (2892809016).

Almost surely, 2^11530203031 is an apocalyptic number.

11530203031 is a deficient number, since it is larger than the sum of its proper divisors (41033033).

11530203031 is an equidigital number, since it uses as much as digits as its factorization.

11530203031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41033032.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 11530203031 its reverse (13030203511), we get a palindrome (24560406542).

The spelling of 11530203031 in words is "eleven billion, five hundred thirty million, two hundred three thousand, thirty-one".