421340523143 has 2 divisors, whose sum is σ = 421340523144. Its totient is φ = 421340523142.

The previous prime is 421340523113. The next prime is 421340523157. The reversal of 421340523143 is 341325043124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421340523143 - 2²⁸ = 421072087687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421340523113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210670261571 + 210670261572.

It is an arithmetic number, because the mean of its divisors is an integer number (210670261572).

Almost surely, 2^421340523143 is an apocalyptic number.

421340523143 is a deficient number, since it is larger than the sum of its proper divisors (1).

421340523143 is an equidigital number, since it uses as much as digits as its factorization.

421340523143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 421340523143 its reverse (341325043124), we get a palindrome (762665566267).

The spelling of 421340523143 in words is "four hundred twenty-one billion, three hundred forty million, five hundred twenty-three thousand, one hundred forty-three".