1431323120 has 80 divisors (see below), whose sum is σ = 3557397312. Its totient is φ = 534251520.

The previous prime is 1431323119. The next prime is 1431323129. The reversal of 1431323120 is 213231341.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1431323092 and 1431323101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431323129) 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, 65954 + ... + 84926.

Almost surely, 2^1431323120 is an apocalyptic number.

1431323120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1431323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778698656).

1431323120 is an abundant number, since it is smaller than the sum of its proper divisors (2126074192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1431323120 is a wasteful number, since it uses less digits than its factorization.

1431323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19050 (or 19044 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1431323120 is about 37832.8312448328. The cubic root of 1431323120 is about 1126.9705368681.

Adding to 1431323120 its reverse (213231341), we get a palindrome (1644554461).

The spelling of 1431323120 in words is "one billion, four hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty".