8213425 has 12 divisors (see below), whose sum is σ = 11110896. Its totient is φ = 5973200.

The previous prime is 8213423. The next prime is 8213437. The reversal of 8213425 is 5243128.

8213425 = T₄₃₀ + T₄₃₁ + ... + T₅₀₄.

8213425 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8213425 - 2¹ = 8213423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8213425.

It is not an unprimeable number, because it can be changed into a prime (8213423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14659 + ... + 15208.

It is an arithmetic number, because the mean of its divisors is an integer number (925908).

Almost surely, 2^8213425 is an apocalyptic number.

It is an amenable number.

8213425 is a deficient number, since it is larger than the sum of its proper divisors (2897471).

8213425 is a wasteful number, since it uses less digits than its factorization.

8213425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29888 (or 29883 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 8213425 is about 2865.9073606800. The cubic root of 8213425 is about 201.7629559377.

The spelling of 8213425 in words is "eight million, two hundred thirteen thousand, four hundred twenty-five".