6131425621 has 4 divisors (see below), whose sum is σ = 6132082752. Its totient is φ = 6130768492.

The previous prime is 6131425607. The next prime is 6131425669. The reversal of 6131425621 is 1265241316.

It is a happy number.

6131425621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6131425621 - 2⁵ = 6131425589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6131425121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314365 + ... + 333298.

It is an arithmetic number, because the mean of its divisors is an integer number (1533020688).

Almost surely, 2^6131425621 is an apocalyptic number.

It is an amenable number.

6131425621 is a deficient number, since it is larger than the sum of its proper divisors (657131).

6131425621 is an equidigital number, since it uses as much as digits as its factorization.

6131425621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657130.

The product of its digits is 8640, while the sum is 31.

The square root of 6131425621 is about 78303.4202381990. The cubic root of 6131425621 is about 1830.2924494046.

Adding to 6131425621 its reverse (1265241316), we get a palindrome (7396666937).

The spelling of 6131425621 in words is "six billion, one hundred thirty-one million, four hundred twenty-five thousand, six hundred twenty-one".