11551530252431 has 4 divisors (see below), whose sum is σ = 12440109502632. Its totient is φ = 10662951002232.

The previous prime is 11551530252413. The next prime is 11551530252517. The reversal of 11551530252431 is 13425203515511.

11551530252431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11551530252431 is a prime.

It is a super-2 number, since 2×11551530252431² (a number of 27 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 (11551530252131) 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, 444289625081 + ... + 444289625106.

It is an arithmetic number, because the mean of its divisors is an integer number (3110027375658).

Almost surely, 2^{11551530252431} is an apocalyptic number.

11551530252431 is a deficient number, since it is larger than the sum of its proper divisors (888579250201).

11551530252431 is an equidigital number, since it uses as much as digits as its factorization.

11551530252431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888579250200.

The product of its (nonzero) digits is 90000, while the sum is 38.

Adding to 11551530252431 its reverse (13425203515511), we get a palindrome (24976733767942).

The spelling of 11551530252431 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty million, two hundred fifty-two thousand, four hundred thirty-one".