1031630161 has 3 divisors (see below), whose sum is σ = 1031662281. Its totient is φ = 1031598042.

The previous prime is 1031630123. The next prime is 1031630179. The reversal of 1031630161 is 1610361301.

It is a happy number.

The square root of 1031630161 is 32119.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1610361301 = 191 ⋅8431211.

It is not a de Polignac number, because 1031630161 - 2¹⁵ = 1031597393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031630191) 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 2 ways as a sum of consecutive naturals, for example, 16060 + ... + 48178.

It is an arithmetic number, because the mean of its divisors is an integer number (343887427).

Almost surely, 2^1031630161 is an apocalyptic number.

1031630161 is the 32119-th square number.

1031630161 is the 16060-th centered octagonal number.

It is an amenable number.

1031630161 is a deficient number, since it is larger than the sum of its proper divisors (32120).

1031630161 is an frugal number, since it uses more digits than its factorization.

1031630161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64238 (or 32119 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The cubic root of 1031630161 is about 1010.4341371234.

Multiplying 1031630161 by its product of nonzero digits (324), we get a square (334248172164 = 578142²).

Adding to 1031630161 its reverse (1610361301), we get a palindrome (2641991462).

The spelling of 1031630161 in words is "one billion, thirty-one million, six hundred thirty thousand, one hundred sixty-one".