1431212505440 has 48 divisors (see below), whose sum is σ = 3497834022480. Its totient is φ = 552744138240.

The previous prime is 1431212505389. The next prime is 1431212505451. The reversal of 1431212505440 is 445052121341.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1431212505397 and 1431212505406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154220846 + ... + 154230125.

It is an arithmetic number, because the mean of its divisors is an integer number (72871542135).

Almost surely, 2^{1431212505440} is an apocalyptic number.

1431212505440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1431212505440 is an abundant number, since it is smaller than the sum of its proper divisors (2066621517040).

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

1431212505440 is a wasteful number, since it uses less digits than its factorization.

1431212505440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308451015 (or 308451007 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 1431212505440 its reverse (445052121341), we get a palindrome (1876264626781).

The spelling of 1431212505440 in words is "one trillion, four hundred thirty-one billion, two hundred twelve million, five hundred five thousand, four hundred forty".