215774113 has 2 divisors, whose sum is σ = 215774114. Its totient is φ = 215774112.

The previous prime is 215774101. The next prime is 215774137. The reversal of 215774113 is 311477512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177742224 + 38031889 = 13332^2 + 6167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215774113 is a prime.

It is equal to p_11902639 and since 215774113 and 11902639 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (215774173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107887056 + 107887057.

It is an arithmetic number, because the mean of its divisors is an integer number (107887057).

Almost surely, 2^215774113 is an apocalyptic number.

It is an amenable number.

215774113 is a deficient number, since it is larger than the sum of its proper divisors (1).

215774113 is an equidigital number, since it uses as much as digits as its factorization.

215774113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 215774113 is about 14689.2516147011. The cubic root of 215774113 is about 599.7907724185.

The spelling of 215774113 in words is "two hundred fifteen million, seven hundred seventy-four thousand, one hundred thirteen".