215203013 has 2 divisors, whose sum is σ = 215203014. Its totient is φ = 215203012.

The previous prime is 215202931. The next prime is 215203039. The reversal of 215203013 is 310302512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155326369 + 59876644 = 12463^2 + 7738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215203013 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 215202982 and 215203000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215203213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107601506 + 107601507.

It is an arithmetic number, because the mean of its divisors is an integer number (107601507).

Almost surely, 2^215203013 is an apocalyptic number.

It is an amenable number.

215203013 is a deficient number, since it is larger than the sum of its proper divisors (1).

215203013 is an equidigital number, since it uses as much as digits as its factorization.

215203013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 215203013 is about 14669.7993510477. The cubic root of 215203013 is about 599.2611395897.

Adding to 215203013 its reverse (310302512), we get a palindrome (525505525).

The spelling of 215203013 in words is "two hundred fifteen million, two hundred three thousand, thirteen".