215135413 has 2 divisors, whose sum is σ = 215135414. Its totient is φ = 215135412.

The previous prime is 215135411. The next prime is 215135447. The reversal of 215135413 is 314531512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171138724 + 43996689 = 13082^2 + 6633^2 .

It is a cyclic number.

It is not a de Polignac number, because 215135413 - 2¹ = 215135411 is a prime.

Together with 215135411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215135411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107567706 + 107567707.

It is an arithmetic number, because the mean of its divisors is an integer number (107567707).

Almost surely, 2^215135413 is an apocalyptic number.

It is an amenable number.

215135413 is a deficient number, since it is larger than the sum of its proper divisors (1).

215135413 is an equidigital number, since it uses as much as digits as its factorization.

215135413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 215135413 is about 14667.4951167539. The cubic root of 215135413 is about 599.1983859834.

Adding to 215135413 its reverse (314531512), we get a palindrome (529666925).

The spelling of 215135413 in words is "two hundred fifteen million, one hundred thirty-five thousand, four hundred thirteen".