851163082225 has 9 divisors (see below), whose sum is σ = 1055447942017. Its totient is φ = 680926775440.

The previous prime is 851163082207. The next prime is 851163082247. The reversal of 851163082225 is 522280361158.

The square root of 851163082225 is 922585.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6852031729 + 844311050496 = 82777^2 + 918864^2 .

It is not a de Polignac number, because 851163082225 - 2⁷ = 851163082097 is a prime.

It is a super-2 number, since 2×851163082225² (a number of 25 digits) 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 8 ways as a sum of consecutive naturals, for example, 4520667 + ... + 4705183.

Almost surely, 2^851163082225 is an apocalyptic number.

851163082225 is the 922585-th square number.

851163082225 is the 461293-rd centered octagonal number.

It is an amenable number.

851163082225 is a deficient number, since it is larger than the sum of its proper divisors (204284859792).

851163082225 is an frugal number, since it uses more digits than its factorization.

851163082225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369044 (or 184522 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 851163082225 in words is "eight hundred fifty-one billion, one hundred sixty-three million, eighty-two thousand, two hundred twenty-five".