201431306 has 4 divisors (see below), whose sum is σ = 302146962. Its totient is φ = 100715652.

The previous prime is 201431287. The next prime is 201431311. The reversal of 201431306 is 603134102.

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., 170172025 + 31259281 = 13045^2 + 5591^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50357825 + ... + 50357828.

Almost surely, 2^201431306 is an apocalyptic number.

201431306 is a deficient number, since it is larger than the sum of its proper divisors (100715656).

201431306 is a wasteful number, since it uses less digits than its factorization.

201431306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100715655.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 201431306 is about 14192.6497173713. The cubic root of 201431306 is about 586.1952876050.

Adding to 201431306 its reverse (603134102), we get a palindrome (804565408).

The spelling of 201431306 in words is "two hundred one million, four hundred thirty-one thousand, three hundred six".