215242354429 has 2 divisors, whose sum is σ = 215242354430. Its totient is φ = 215242354428.

The previous prime is 215242354409. The next prime is 215242354471. The reversal of 215242354429 is 924453242512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114944731225 + 100297623204 = 339035^2 + 316698^2 .

It is a cyclic number.

It is not a de Polignac number, because 215242354429 - 2²¹ = 215240257277 is a prime.

It is a super-2 number, since 2×215242354429² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215242354409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107621177214 + 107621177215.

It is an arithmetic number, because the mean of its divisors is an integer number (107621177215).

Almost surely, 2^215242354429 is an apocalyptic number.

It is an amenable number.

215242354429 is a deficient number, since it is larger than the sum of its proper divisors (1).

215242354429 is an equidigital number, since it uses as much as digits as its factorization.

215242354429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 43.

The spelling of 215242354429 in words is "two hundred fifteen billion, two hundred forty-two million, three hundred fifty-four thousand, four hundred twenty-nine".