201431213 has 4 divisors (see below), whose sum is σ = 201555900. Its totient is φ = 201306528.

The previous prime is 201431177. The next prime is 201431231. The reversal of 201431213 is 312134102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44129449 + 157301764 = 6643^2 + 12542^2 .

It is a cyclic number.

It is not a de Polignac number, because 201431213 - 2¹⁸ = 201169069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201431191 and 201431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201430213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59888 + ... + 63161.

It is an arithmetic number, because the mean of its divisors is an integer number (50388975).

Almost surely, 2^201431213 is an apocalyptic number.

It is an amenable number.

201431213 is a deficient number, since it is larger than the sum of its proper divisors (124687).

201431213 is a wasteful number, since it uses less digits than its factorization.

201431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124686.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 201431213 is about 14192.6464410271. The cubic root of 201431213 is about 586.1951973904.

Adding to 201431213 its reverse (312134102), we get a palindrome (513565315).

The spelling of 201431213 in words is "two hundred one million, four hundred thirty-one thousand, two hundred thirteen".