201031013 has 2 divisors, whose sum is σ = 201031014. Its totient is φ = 201031012.

The previous prime is 201031009. The next prime is 201031043. The reversal of 201031013 is 310130102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161366209 + 39664804 = 12703^2 + 6298^2 .

It is a cyclic number.

It is not a de Polignac number, because 201031013 - 2² = 201031009 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 201030985 and 201031003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201031003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100515506 + 100515507.

It is an arithmetic number, because the mean of its divisors is an integer number (100515507).

Almost surely, 2^201031013 is an apocalyptic number.

It is an amenable number.

201031013 is a deficient number, since it is larger than the sum of its proper divisors (1).

201031013 is an equidigital number, since it uses as much as digits as its factorization.

201031013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 201031013 is about 14178.5405807509. The cubic root of 201031013 is about 585.8067258960.

Adding to 201031013 its reverse (310130102), we get a palindrome (511161115).

The spelling of 201031013 in words is "two hundred one million, thirty-one thousand, thirteen".