1320354431 has 16 divisors (see below), whose sum is σ = 1494113280. Its totient is φ = 1156317120.

The previous prime is 1320354407. The next prime is 1320354437. The reversal of 1320354431 is 1344530231.

It is a cyclic number.

It is not a de Polignac number, because 1320354431 - 2¹⁰ = 1320353407 is a prime.

It is a super-2 number, since 2×1320354431² = 3486671646922667522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320354431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320354437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15410 + ... + 53648.

It is an arithmetic number, because the mean of its divisors is an integer number (93382080).

Almost surely, 2^1320354431 is an apocalyptic number.

1320354431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320354431 is a deficient number, since it is larger than the sum of its proper divisors (173758849).

1320354431 is a wasteful number, since it uses less digits than its factorization.

1320354431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38366.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1320354431 is about 36336.6816178913. The cubic root of 1320354431 is about 1097.0594827848.

Adding to 1320354431 its reverse (1344530231), we get a palindrome (2664884662).

The spelling of 1320354431 in words is "one billion, three hundred twenty million, three hundred fifty-four thousand, four hundred thirty-one".