813217025 has 12 divisors (see below), whose sum is σ = 1010006784. Its totient is φ = 649530000.

The previous prime is 813216997. The next prime is 813217037. The reversal of 813217025 is 520712318.

It is not a de Polignac number, because 813217025 - 2⁶ = 813216961 is a prime.

It is a super-2 number, since 2×813217025² = 1322643859499701250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10001 + ... + 41550.

It is an arithmetic number, because the mean of its divisors is an integer number (84167232).

Almost surely, 2^813217025 is an apocalyptic number.

It is an amenable number.

813217025 is a deficient number, since it is larger than the sum of its proper divisors (196789759).

813217025 is a wasteful number, since it uses less digits than its factorization.

813217025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52192 (or 52187 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 813217025 is about 28516.9603043522. The cubic root of 813217025 is about 933.4022011967.

The spelling of 813217025 in words is "eight hundred thirteen million, two hundred seventeen thousand, twenty-five".