11144522531 has 4 divisors (see below), whose sum is σ = 11144735592. Its totient is φ = 11144309472.

The previous prime is 11144522527. The next prime is 11144522621. The reversal of 11144522531 is 13522544111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13522544111 = 61 ⋅221681051.

It is a cyclic number.

It is not a de Polignac number, because 11144522531 - 2² = 11144522527 is a prime.

It is a super-2 number, since 2×11144522531² (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 = 11144522494 and 11144522503.

It is not an unprimeable number, because it can be changed into a prime (11144522231) 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, 31835 + ... + 152651.

It is an arithmetic number, because the mean of its divisors is an integer number (2786183898).

Almost surely, 2^11144522531 is an apocalyptic number.

11144522531 is a deficient number, since it is larger than the sum of its proper divisors (213061).

11144522531 is an equidigital number, since it uses as much as digits as its factorization.

11144522531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213060.

The product of its digits is 4800, while the sum is 29.

The spelling of 11144522531 in words is "eleven billion, one hundred forty-four million, five hundred twenty-two thousand, five hundred thirty-one".