215028629 has 2 divisors, whose sum is σ = 215028630. Its totient is φ = 215028628.

The previous prime is 215028607. The next prime is 215028659. The reversal of 215028629 is 926820512.

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., 144048004 + 70980625 = 12002^2 + 8425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215028629 is a prime.

It is a super-2 number, since 2×215028629² = 92474622579239282, which contains 22 as substring.

It is equal to p_11863772 and since 215028629 and 11863772 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215028659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107514314 + 107514315.

It is an arithmetic number, because the mean of its divisors is an integer number (107514315).

Almost surely, 2^215028629 is an apocalyptic number.

It is an amenable number.

215028629 is a deficient number, since it is larger than the sum of its proper divisors (1).

215028629 is an equidigital number, since it uses as much as digits as its factorization.

215028629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 215028629 is about 14663.8545069160. The cubic root of 215028629 is about 599.0992307755.

The spelling of 215028629 in words is "two hundred fifteen million, twenty-eight thousand, six hundred twenty-nine".