431312402 has 4 divisors (see below), whose sum is σ = 646968606. Its totient is φ = 215656200.

The previous prime is 431312383. The next prime is 431312417. The reversal of 431312402 is 204213134.

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., 287336401 + 143976001 = 16951^2 + 11999^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107828099 + ... + 107828102.

Almost surely, 2^431312402 is an apocalyptic number.

431312402 is a deficient number, since it is larger than the sum of its proper divisors (215656204).

431312402 is a wasteful number, since it uses less digits than its factorization.

431312402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215656203.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 431312402 is about 20768.0620665482. The cubic root of 431312402 is about 755.5513432563.

Adding to 431312402 its reverse (204213134), we get a palindrome (635525536).

The spelling of 431312402 in words is "four hundred thirty-one million, three hundred twelve thousand, four hundred two".