6431210042 has 4 divisors (see below), whose sum is σ = 9646815066. Its totient is φ = 3215605020.

The previous prime is 6431210039. The next prime is 6431210077. The reversal of 6431210042 is 2400121346.

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

It can be written as a sum of positive squares in only one way, i.e., 5712487561 + 718722481 = 75581^2 + 26809^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607802509 + ... + 1607802512.

Almost surely, 2^6431210042 is an apocalyptic number.

6431210042 is a deficient number, since it is larger than the sum of its proper divisors (3215605024).

6431210042 is a wasteful number, since it uses less digits than its factorization.

6431210042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215605023.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6431210042 is about 80194.8255313271. The cubic root of 6431210042 is about 1859.6486446592.

Adding to 6431210042 its reverse (2400121346), we get a palindrome (8831331388).

The spelling of 6431210042 in words is "six billion, four hundred thirty-one million, two hundred ten thousand, forty-two".