1015832173225 has 9 divisors (see below), whose sum is σ = 1259638143717. Its totient is φ = 812661707040.

The previous prime is 1015832173217. The next prime is 1015832173243. The reversal of 1015832173225 is 5223712385101.

The square root of 1015832173225 is 1007885.

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 4447956249 + 1011384216976 = 66693^2 + 1005676^2 .

It is not a de Polignac number, because 1015832173225 - 2³ = 1015832173217 is a prime.

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, 4938637 + ... + 5140213.

Almost surely, 2^{1015832173225} is an apocalyptic number.

1015832173225 is the 1007885-th square number.

1015832173225 is the 503943-rd centered octagonal number.

It is an amenable number.

1015832173225 is a deficient number, since it is larger than the sum of its proper divisors (243805970492).

1015832173225 is an frugal number, since it uses more digits than its factorization.

1015832173225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403164 (or 201582 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 1015832173225 in words is "one trillion, fifteen billion, eight hundred thirty-two million, one hundred seventy-three thousand, two hundred twenty-five".