12240251531 has 8 divisors (see below), whose sum is σ = 12663604800. Its totient is φ = 11816983360.

The previous prime is 12240251503. The next prime is 12240251537. The reversal of 12240251531 is 13515204221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12240251531 - 2¹⁸ = 12239989387 is a prime.

It is a super-2 number, since 2×12240251531² (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 12240251531.

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 7 ways as a sum of consecutive naturals, for example, 444575 + ... + 471303.

It is an arithmetic number, because the mean of its divisors is an integer number (1582950600).

Almost surely, 2^12240251531 is an apocalyptic number.

12240251531 is a deficient number, since it is larger than the sum of its proper divisors (423353269).

12240251531 is a wasteful number, since it uses less digits than its factorization.

12240251531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42549.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12240251531 its reverse (13515204221), we get a palindrome (25755455752).

The spelling of 12240251531 in words is "twelve billion, two hundred forty million, two hundred fifty-one thousand, five hundred thirty-one".