320422625 has 8 divisors (see below), whose sum is σ = 399887592. Its totient is φ = 256338000.

The previous prime is 320422607. The next prime is 320422643. The reversal of 320422625 is 526224023.

It is an interprime number because it is at equal distance from previous prime (320422607) and next prime (320422643).

It can be written as a sum of positive squares in 4 ways, for example, as 88134544 + 232288081 = 9388^2 + 15241^2 .

It is not a de Polignac number, because 320422625 - 2²⁴ = 303645409 is a prime.

It is a super-2 number, since 2×320422625² = 205341317223781250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320422594 and 320422603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281566 + ... + 1281815.

It is an arithmetic number, because the mean of its divisors is an integer number (49985949).

Almost surely, 2^320422625 is an apocalyptic number.

It is an amenable number.

320422625 is a deficient number, since it is larger than the sum of its proper divisors (79464967).

320422625 is an equidigital number, since it uses as much as digits as its factorization.

320422625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563396 (or 2563386 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 320422625 is about 17900.3526501575. The cubic root of 320422625 is about 684.2913622831.

Adding to 320422625 its reverse (526224023), we get a palindrome (846646648).

The spelling of 320422625 in words is "three hundred twenty million, four hundred twenty-two thousand, six hundred twenty-five".