1431243125550 has 384 divisors, whose sum is σ = 4618761523200. Its totient is φ = 319072037760.

The previous prime is 1431243125519. The next prime is 1431243125617. The reversal of 1431243125550 is 555213421341.

1431243125550 is a `hidden beast` number, since 1 + 4 + 31 + 24 + 31 + 25 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 336049321 + ... + 336053579.

It is an arithmetic number, because the mean of its divisors is an integer number (12028024800).

Almost surely, 2^{1431243125550} is an apocalyptic number.

1431243125550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1431243125550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309380761600).

1431243125550 is an abundant number, since it is smaller than the sum of its proper divisors (3187518397650).

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

1431243125550 is a wasteful number, since it uses less digits than its factorization.

1431243125550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157 (or 5146 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 1431243125550 its reverse (555213421341), we get a palindrome (1986456546891).

The spelling of 1431243125550 in words is "one trillion, four hundred thirty-one billion, two hundred forty-three million, one hundred twenty-five thousand, five hundred fifty".