12255212531 has 4 divisors (see below), whose sum is σ = 12255811992. Its totient is φ = 12254613072.

The previous prime is 12255212527. The next prime is 12255212533. The reversal of 12255212531 is 13521255221.

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: 13521255221 = 283 ⋅47778287.

It is a cyclic number.

It is not a de Polignac number, because 12255212531 - 2² = 12255212527 is a prime.

It is a super-2 number, since 2×12255212531² (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 = 12255212494 and 12255212503.

It is not an unprimeable number, because it can be changed into a prime (12255212533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267941 + ... + 310326.

It is an arithmetic number, because the mean of its divisors is an integer number (3063952998).

Almost surely, 2^12255212531 is an apocalyptic number.

12255212531 is a deficient number, since it is larger than the sum of its proper divisors (599461).

12255212531 is an equidigital number, since it uses as much as digits as its factorization.

12255212531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599460.

The product of its digits is 6000, while the sum is 29.

Adding to 12255212531 its reverse (13521255221), we get a palindrome (25776467752).

The spelling of 12255212531 in words is "twelve billion, two hundred fifty-five million, two hundred twelve thousand, five hundred thirty-one".