215359121 has 2 divisors, whose sum is σ = 215359122. Its totient is φ = 215359120.

The previous prime is 215359057. The next prime is 215359141. The reversal of 215359121 is 121953512.

215359121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160376896 + 54982225 = 12664^2 + 7415^2 .

It is a cyclic number.

It is not a de Polignac number, because 215359121 - 2⁶ = 215359057 is a prime.

It is not a weakly prime, because it can be changed into another prime (215359141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107679560 + 107679561.

It is an arithmetic number, because the mean of its divisors is an integer number (107679561).

Almost surely, 2^215359121 is an apocalyptic number.

It is an amenable number.

215359121 is a deficient number, since it is larger than the sum of its proper divisors (1).

215359121 is an equidigital number, since it uses as much as digits as its factorization.

215359121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 29.

The square root of 215359121 is about 14675.1191136563. The cubic root of 215359121 is about 599.4060056638.

The spelling of 215359121 in words is "two hundred fifteen million, three hundred fifty-nine thousand, one hundred twenty-one".