1313440431 has 32 divisors (see below), whose sum is σ = 1810400256. Its totient is φ = 846720000.

The previous prime is 1313440423. The next prime is 1313440439. The reversal of 1313440431 is 1340443131.

It is an interprime number because it is at equal distance from previous prime (1313440423) and next prime (1313440439).

It is not a de Polignac number, because 1313440431 - 2³ = 1313440423 is a prime.

It is a super-2 number, since 2×1313440431² = 3450251531570931522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313440439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3119601 + ... + 3120021.

It is an arithmetic number, because the mean of its divisors is an integer number (56575008).

Almost surely, 2^1313440431 is an apocalyptic number.

1313440431 is a deficient number, since it is larger than the sum of its proper divisors (496959825).

1313440431 is a wasteful number, since it uses less digits than its factorization.

1313440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1313440431 is about 36241.4187222300. The cubic root of 1313440431 is about 1095.1412232108.

Adding to 1313440431 its reverse (1340443131), we get a palindrome (2653883562).

The spelling of 1313440431 in words is "one billion, three hundred thirteen million, four hundred forty thousand, four hundred thirty-one".