12455420531 has 4 divisors (see below), whose sum is σ = 13110969000. Its totient is φ = 11799872064.

The previous prime is 12455420513. The next prime is 12455420543. The reversal of 12455420531 is 13502455421.

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

It is a cyclic number.

It is not a de Polignac number, because 12455420531 - 2¹⁴ = 12455404147 is a prime.

It is a super-2 number, since 2×12455420531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12455420501) 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, 327774206 + ... + 327774243.

It is an arithmetic number, because the mean of its divisors is an integer number (3277742250).

Almost surely, 2^12455420531 is an apocalyptic number.

12455420531 is a deficient number, since it is larger than the sum of its proper divisors (655548469).

12455420531 is an equidigital number, since it uses as much as digits as its factorization.

12455420531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655548468.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 12455420531 its reverse (13502455421), we get a palindrome (25957875952).

The spelling of 12455420531 in words is "twelve billion, four hundred fifty-five million, four hundred twenty thousand, five hundred thirty-one".