816212425 has 36 divisors (see below), whose sum is σ = 1175341440. Its totient is φ = 550804320.

The previous prime is 816212413. The next prime is 816212429. The reversal of 816212425 is 524212618.

It is a de Polignac number, because none of the positive numbers 2^k-816212425 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816212429) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 785056 + ... + 786094.

Almost surely, 2^816212425 is an apocalyptic number.

It is an amenable number.

816212425 is a deficient number, since it is larger than the sum of its proper divisors (359129015).

816212425 is a wasteful number, since it uses less digits than its factorization.

816212425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1118 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 816212425 is about 28569.4316534299. The cubic root of 816212425 is about 934.5468268244.

The spelling of 816212425 in words is "eight hundred sixteen million, two hundred twelve thousand, four hundred twenty-five".