82201813 has 2 divisors, whose sum is σ = 82201814. Its totient is φ = 82201812.

The previous prime is 82201799. The next prime is 82201829. The reversal of 82201813 is 31810228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82047364 + 154449 = 9058^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 82201813 - 2¹³ = 82193621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82201213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41100906 + 41100907.

It is an arithmetic number, because the mean of its divisors is an integer number (41100907).

Almost surely, 2^82201813 is an apocalyptic number.

It is an amenable number.

82201813 is a deficient number, since it is larger than the sum of its proper divisors (1).

82201813 is an equidigital number, since it uses as much as digits as its factorization.

82201813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 82201813 is about 9066.5215490837. The cubic root of 82201813 is about 434.8042683081.

The spelling of 82201813 in words is "eighty-two million, two hundred one thousand, eight hundred thirteen".