215203442 has 16 divisors (see below), whose sum is σ = 342065592. Its totient is φ = 101191680.

The previous prime is 215203423. The next prime is 215203453. The reversal of 215203442 is 244302512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 178249201 + 36954241 = 13351^2 + 6079^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81698 + ... + 84290.

Almost surely, 2^215203442 is an apocalyptic number.

215203442 is a deficient number, since it is larger than the sum of its proper divisors (126862150).

215203442 is a wasteful number, since it uses less digits than its factorization.

215203442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 215203442 is about 14669.8139729173. The cubic root of 215203442 is about 599.2615377918.

Adding to 215203442 its reverse (244302512), we get a palindrome (459505954).

The spelling of 215203442 in words is "two hundred fifteen million, two hundred three thousand, four hundred forty-two".