1631331361 has 8 divisors (see below), whose sum is σ = 1813212864. Its totient is φ = 1455046320.

The previous prime is 1631331313. The next prime is 1631331389.

1631331361 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1631331361 - 2¹⁷ = 1631200289 is a prime.

It is a super-2 number, since 2×1631331361² = 5322484018764224642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631301361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398501 + ... + 1399666.

It is an arithmetic number, because the mean of its divisors is an integer number (226651608).

Almost surely, 2^1631331361 is an apocalyptic number.

1631331361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1631331361 is a deficient number, since it is larger than the sum of its proper divisors (181881503).

1631331361 is a wasteful number, since it uses less digits than its factorization.

1631331361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798231.

The product of its digits is 2916, while the sum is 28.

The square root of 1631331361 is about 40389.7432648439. The cubic root of 1631331361 is about 1177.1922521615.

It can be divided in two parts, 16313 and 31361, that added together give a palindrome (47674).

The spelling of 1631331361 in words is "one billion, six hundred thirty-one million, three hundred thirty-one thousand, three hundred sixty-one".