8216425 has 24 divisors (see below), whose sum is σ = 12052800. Its totient is φ = 5436480.

The previous prime is 8216407. The next prime is 8216437. The reversal of 8216425 is 5246128.

It is not a de Polignac number, because 8216425 - 2⁷ = 8216297 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8216393 and 8216402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4266 + ... + 5884.

It is an arithmetic number, because the mean of its divisors is an integer number (502200).

Almost surely, 2^8216425 is an apocalyptic number.

It is an amenable number.

8216425 is a deficient number, since it is larger than the sum of its proper divisors (3836375).

8216425 is a wasteful number, since it uses less digits than its factorization.

8216425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1660 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 8216425 is about 2866.4307073432. The cubic root of 8216425 is about 201.7875179683.

The spelling of 8216425 in words is "eight million, two hundred sixteen thousand, four hundred twenty-five".