421140444231 has 64 divisors (see below), whose sum is σ = 638168573952. Its totient is φ = 245089608192.

The previous prime is 421140444211. The next prime is 421140444233. The reversal of 421140444231 is 132444041124.

It is a happy number.

It is not a de Polignac number, because 421140444231 - 2¹¹ = 421140442183 is a prime.

It is a super-2 number, since 2×421140444231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421140444233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62545341 + ... + 62552073.

It is an arithmetic number, because the mean of its divisors is an integer number (9971383968).

Almost surely, 2^421140444231 is an apocalyptic number.

421140444231 is a deficient number, since it is larger than the sum of its proper divisors (217028129721).

421140444231 is a wasteful number, since it uses less digits than its factorization.

421140444231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 421140444231 its reverse (132444041124), we get a palindrome (553584485355).

The spelling of 421140444231 in words is "four hundred twenty-one billion, one hundred forty million, four hundred forty-four thousand, two hundred thirty-one".