1231543505452 has 24 divisors (see below), whose sum is σ = 2330947172736. Its totient is φ = 565965184128.

The previous prime is 1231543505419. The next prime is 1231543505473. The reversal of 1231543505452 is 2545053451321.

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, 50810908 + ... + 50835139.

It is an arithmetic number, because the mean of its divisors is an integer number (97122798864).

Almost surely, 2^{1231543505452} is an apocalyptic number.

It is an amenable number.

1231543505452 is a deficient number, since it is larger than the sum of its proper divisors (1099403667284).

1231543505452 is a wasteful number, since it uses less digits than its factorization.

1231543505452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101646297 (or 101646295 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 1231543505452 its reverse (2545053451321), we get a palindrome (3776596956773).

The spelling of 1231543505452 in words is "one trillion, two hundred thirty-one billion, five hundred forty-three million, five hundred five thousand, four hundred fifty-two".