210434123431 has 4 divisors (see below), whose sum is σ = 240496141072. Its totient is φ = 180372105792.

The previous prime is 210434123413. The next prime is 210434123437. The reversal of 210434123431 is 134321434012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210434123431 - 2²³ = 210425734823 is a prime.

It is a super-2 number, since 2×210434123431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210434123431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210434123437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15031008810 + ... + 15031008823.

It is an arithmetic number, because the mean of its divisors is an integer number (60124035268).

Almost surely, 2^210434123431 is an apocalyptic number.

210434123431 is a deficient number, since it is larger than the sum of its proper divisors (30062017641).

210434123431 is an equidigital number, since it uses as much as digits as its factorization.

210434123431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30062017640.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 210434123431 its reverse (134321434012), we get a palindrome (344755557443).

The spelling of 210434123431 in words is "two hundred ten billion, four hundred thirty-four million, one hundred twenty-three thousand, four hundred thirty-one".