12240251533 has 4 divisors (see below), whose sum is σ = 12571069180. Its totient is φ = 11909433888.

The previous prime is 12240251503. The next prime is 12240251537. The reversal of 12240251533 is 33515204221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9416179369 + 2824072164 = 97037^2 + 53142^2 .

It is a cyclic number.

It is not a de Polignac number, because 12240251533 - 2¹⁷ = 12240120461 is a prime.

It is a super-2 number, since 2×12240251533² (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 (12240251537) 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, 165408768 + ... + 165408841.

It is an arithmetic number, because the mean of its divisors is an integer number (3142767295).

Almost surely, 2^12240251533 is an apocalyptic number.

It is an amenable number.

12240251533 is a deficient number, since it is larger than the sum of its proper divisors (330817647).

12240251533 is an equidigital number, since it uses as much as digits as its factorization.

12240251533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330817646.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 12240251533 its reverse (33515204221), we get a palindrome (45755455754).

The spelling of 12240251533 in words is "twelve billion, two hundred forty million, two hundred fifty-one thousand, five hundred thirty-three".