1015320232161 has 15 divisors (see below), whose sum is σ = 1516726486561. Its totient is φ = 676874108988.

The previous prime is 1015320232159. The next prime is 1015320232169. The reversal of 1015320232161 is 1612320235101.

The square root of 1015320232161 is 1007631.

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

1015320232161 is a `hidden beast` number, since 1 + 0 + 15 + 320 + 2 + 321 + 6 + 1 = 666.

It is not a de Polignac number, because 1015320232161 - 2¹ = 1015320232159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1015320232169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9012700 + ... + 9124658.

Almost surely, 2^{1015320232161} is an apocalyptic number.

1015320232161 is the 1007631-st square number.

1015320232161 is the 503816-th centered octagonal number.

It is an amenable number.

1015320232161 is a deficient number, since it is larger than the sum of its proper divisors (501406254400).

1015320232161 is an frugal number, since it uses more digits than its factorization.

1015320232161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223930 (or 111962 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 1015320232161 its reverse (1612320235101), we get a palindrome (2627640467262).

The spelling of 1015320232161 in words is "one trillion, fifteen billion, three hundred twenty million, two hundred thirty-two thousand, one hundred sixty-one".