1331616431 has 8 divisors (see below), whose sum is σ = 1357382304. Its totient is φ = 1306045440.

The previous prime is 1331616413. The next prime is 1331616493. The reversal of 1331616431 is 1346161331.

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 1331616431 - 2⁶ = 1331616367 is a prime.

It is a super-2 number, since 2×1331616431² = 3546404638618355522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331616394 and 1331616403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331616401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34886 + ... + 62291.

It is an arithmetic number, because the mean of its divisors is an integer number (169672788).

Almost surely, 2^1331616431 is an apocalyptic number.

1331616431 is a deficient number, since it is larger than the sum of its proper divisors (25765873).

1331616431 is an equidigital number, since it uses as much as digits as its factorization.

1331616431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97441.

The product of its digits is 3888, while the sum is 29.

The square root of 1331616431 is about 36491.3199405009. The cubic root of 1331616431 is about 1100.1697894934.

Adding to 1331616431 its reverse (1346161331), we get a palindrome (2677777762).

The spelling of 1331616431 in words is "one billion, three hundred thirty-one million, six hundred sixteen thousand, four hundred thirty-one".