52215913 has 2 divisors, whose sum is σ = 52215914. Its totient is φ = 52215912.

The previous prime is 52215907. The next prime is 52215929. The reversal of 52215913 is 31951225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31449664 + 20766249 = 5608^2 + 4557^2 .

It is a cyclic number.

It is not a de Polignac number, because 52215913 - 2¹³ = 52207721 is a prime.

It is not a weakly prime, because it can be changed into another prime (52215983) 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 as a sum of consecutive naturals, namely, 26107956 + 26107957.

It is an arithmetic number, because the mean of its divisors is an integer number (26107957).

Almost surely, 2^52215913 is an apocalyptic number.

It is an amenable number.

52215913 is a deficient number, since it is larger than the sum of its proper divisors (1).

52215913 is an equidigital number, since it uses as much as digits as its factorization.

52215913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 52215913 is about 7226.0579156273. The cubic root of 52215913 is about 373.7670033986.

The spelling of 52215913 in words is "fifty-two million, two hundred fifteen thousand, nine hundred thirteen".