143423201421 has 32 divisors (see below), whose sum is σ = 216543974400. Its totient is φ = 93793106160.

The previous prime is 143423201387. The next prime is 143423201447. The reversal of 143423201421 is 124102324341.

143423201421 is a `hidden beast` number, since 1 + 4 + 3 + 4 + 232 + 0 + 1 + 421 = 666.

It is not a de Polignac number, because 143423201421 - 2²¹ = 143421104269 is a prime.

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 (143423201921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 647536 + ... + 840326.

It is an arithmetic number, because the mean of its divisors is an integer number (6766999200).

Almost surely, 2^143423201421 is an apocalyptic number.

It is an amenable number.

143423201421 is a deficient number, since it is larger than the sum of its proper divisors (73120772979).

143423201421 is a wasteful number, since it uses less digits than its factorization.

143423201421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193326 (or 193320 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 143423201421 its reverse (124102324341), we get a palindrome (267525525762).

The spelling of 143423201421 in words is "one hundred forty-three billion, four hundred twenty-three million, two hundred one thousand, four hundred twenty-one".