210431423402 has 8 divisors (see below), whose sum is σ = 315830549412. Its totient is φ = 105154573600.

The previous prime is 210431423399. The next prime is 210431423407. The reversal of 210431423402 is 204324134012.

It can be written as a sum of positive squares in 2 ways, for example, as 210241507441 + 189915961 = 458521^2 + 13781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (210431423407) 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, 30564749 + ... + 30571632.

Almost surely, 2^210431423402 is an apocalyptic number.

210431423402 is a deficient number, since it is larger than the sum of its proper divisors (105399126010).

210431423402 is a wasteful number, since it uses less digits than its factorization.

210431423402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61138104.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 210431423402 its reverse (204324134012), we get a palindrome (414755557414).

The spelling of 210431423402 in words is "two hundred ten billion, four hundred thirty-one million, four hundred twenty-three thousand, four hundred two".