210444442431 has 16 divisors (see below), whose sum is σ = 289661196288. Its totient is φ = 135762530400.

The previous prime is 210444442387. The next prime is 210444442459. The reversal of 210444442431 is 134244444012.

It is not a de Polignac number, because 210444442431 - 2¹⁹ = 210443918143 is a prime.

It is a super-2 number, since 2×210444442431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210444442392 and 210444442401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210444442231) 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, 1773421 + ... + 1888361.

It is an arithmetic number, because the mean of its divisors is an integer number (18103824768).

Almost surely, 2^210444442431 is an apocalyptic number.

210444442431 is a deficient number, since it is larger than the sum of its proper divisors (79216753857).

210444442431 is a wasteful number, since it uses less digits than its factorization.

210444442431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134662.

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 210444442431 its reverse (134244444012), we get a palindrome (344688886443).

The spelling of 210444442431 in words is "two hundred ten billion, four hundred forty-four million, four hundred forty-two thousand, four hundred thirty-one".