1143400311252 has 48 divisors (see below), whose sum is σ = 2973903004800. Its totient is φ = 379907916480.

The previous prime is 1143400311211. The next prime is 1143400311257. The reversal of 1143400311252 is 2521130043411.

1143400311252 is a `hidden beast` number, since 1 + 1 + 4 + 3 + 400 + 3 + 1 + 1 + 252 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143400311257) 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, 16987377 + ... + 17054552.

It is an arithmetic number, because the mean of its divisors is an integer number (61956312600).

Almost surely, 2^{1143400311252} is an apocalyptic number.

1143400311252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1143400311252 is an abundant number, since it is smaller than the sum of its proper divisors (1830502693548).

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

1143400311252 is a wasteful number, since it uses less digits than its factorization.

1143400311252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34042253 (or 34042245 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1143400311252 its reverse (2521130043411), we get a palindrome (3664530354663).

The spelling of 1143400311252 in words is "one trillion, one hundred forty-three billion, four hundred million, three hundred eleven thousand, two hundred fifty-two".