1331430231 has 8 divisors (see below), whose sum is σ = 1801736704. Its totient is φ = 874371960.

The previous prime is 1331430229. The next prime is 1331430251. The reversal of 1331430231 is 1320341331.

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

It is not a de Polignac number, because 1331430231 - 2¹ = 1331430229 is a prime.

It is a super-2 number, since 2×1331430231² = 3545412920041426722, 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 = 1331430198 and 1331430207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331430251) 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, 3311815 + ... + 3312216.

It is an arithmetic number, because the mean of its divisors is an integer number (225217088).

Almost surely, 2^1331430231 is an apocalyptic number.

1331430231 is a deficient number, since it is larger than the sum of its proper divisors (470306473).

1331430231 is an equidigital number, since it uses as much as digits as its factorization.

1331430231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624101.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1331430231 is about 36488.7685596541. The cubic root of 1331430231 is about 1100.1185081687.

Adding to 1331430231 its reverse (1320341331), we get a palindrome (2651771562).

Subtracting from 1331430231 its reverse (1320341331), we obtain a square (11088900 = 3330²).

The spelling of 1331430231 in words is "one billion, three hundred thirty-one million, four hundred thirty thousand, two hundred thirty-one".