1320423331 has 16 divisors (see below), whose sum is σ = 1412524800. Its totient is φ = 1231574400.

The previous prime is 1320423319. The next prime is 1320423341. The reversal of 1320423331 is 1333240231.

It is a cyclic number.

It is not a de Polignac number, because 1320423331 - 2⁹ = 1320422819 is a prime.

It is a super-2 number, since 2×1320423331² = 3487035546098271122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320423341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737185 + ... + 738973.

It is an arithmetic number, because the mean of its divisors is an integer number (88282800).

Almost surely, 2^1320423331 is an apocalyptic number.

1320423331 is a deficient number, since it is larger than the sum of its proper divisors (92101469).

1320423331 is a wasteful number, since it uses less digits than its factorization.

1320423331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 1320423331 is about 36337.6296832911. The cubic root of 1320423331 is about 1097.0785650559.

Adding to 1320423331 its reverse (1333240231), we get a palindrome (2653663562).

The spelling of 1320423331 in words is "one billion, three hundred twenty million, four hundred twenty-three thousand, three hundred thirty-one".