11214233531 has 4 divisors (see below), whose sum is σ = 11487751464. Its totient is φ = 10940715600.

The previous prime is 11214233509. The next prime is 11214233543. The reversal of 11214233531 is 13533241211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13533241211 = 7 ⋅1933320173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11214233531 is a prime.

It is a super-2 number, since 2×11214233531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11214233531.

It is not an unprimeable number, because it can be changed into a prime (11214263531) 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, 136758905 + ... + 136758986.

It is an arithmetic number, because the mean of its divisors is an integer number (2871937866).

Almost surely, 2^11214233531 is an apocalyptic number.

11214233531 is a deficient number, since it is larger than the sum of its proper divisors (273517933).

11214233531 is an equidigital number, since it uses as much as digits as its factorization.

11214233531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273517932.

The product of its digits is 2160, while the sum is 26.

Adding to 11214233531 its reverse (13533241211), we get a palindrome (24747474742).

The spelling of 11214233531 in words is "eleven billion, two hundred fourteen million, two hundred thirty-three thousand, five hundred thirty-one".