11142645431 has 4 divisors (see below), whose sum is σ = 11144768664. Its totient is φ = 11140522200.

The previous prime is 11142645419. The next prime is 11142645439. The reversal of 11142645431 is 13454624111.

11142645431 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-11142645431 is a prime.

It is a super-2 number, since 2×11142645431² (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 (11142645439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053725 + ... + 1064246.

It is an arithmetic number, because the mean of its divisors is an integer number (2786192166).

Almost surely, 2^11142645431 is an apocalyptic number.

11142645431 is a deficient number, since it is larger than the sum of its proper divisors (2123233).

11142645431 is an equidigital number, since it uses as much as digits as its factorization.

11142645431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123232.

The product of its digits is 11520, while the sum is 32.

The spelling of 11142645431 in words is "eleven billion, one hundred forty-two million, six hundred forty-five thousand, four hundred thirty-one".