8425620431 has 4 divisors (see below), whose sum is σ = 8434298664. Its totient is φ = 8416942200.

The previous prime is 8425620419. The next prime is 8425620457. The reversal of 8425620431 is 1340265248.

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 8425620431 - 2⁶ = 8425620367 is a prime.

It is a super-2 number, since 2×8425620431² (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 = 8425620391 and 8425620400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8425620491) 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, 4337660 + ... + 4339601.

It is an arithmetic number, because the mean of its divisors is an integer number (2108574666).

Almost surely, 2^8425620431 is an apocalyptic number.

8425620431 is a deficient number, since it is larger than the sum of its proper divisors (8678233).

8425620431 is an equidigital number, since it uses as much as digits as its factorization.

8425620431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678232.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 8425620431 is about 91791.1783942226. The cubic root of 8425620431 is about 2034.8573233545.

Adding to 8425620431 its reverse (1340265248), we get a palindrome (9765885679).

The spelling of 8425620431 in words is "eight billion, four hundred twenty-five million, six hundred twenty thousand, four hundred thirty-one".