1215333242 has 4 divisors (see below), whose sum is σ = 1822999866. Its totient is φ = 607666620.

The previous prime is 1215333241. The next prime is 1215333277. The reversal of 1215333242 is 2423335121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1095014281 + 120318961 = 33091^2 + 10969^2 .

It is a super-2 number, since 2×1215333242² = 2954069778220461128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1215333241) 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, 303833309 + ... + 303833312.

Almost surely, 2^1215333242 is an apocalyptic number.

1215333242 is a deficient number, since it is larger than the sum of its proper divisors (607666624).

1215333242 is an equidigital number, since it uses as much as digits as its factorization.

1215333242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607666623.

The product of its digits is 4320, while the sum is 26.

The square root of 1215333242 is about 34861.6299389458. The cubic root of 1215333242 is about 1067.1655384984.

Adding to 1215333242 its reverse (2423335121), we get a palindrome (3638668363).

The spelling of 1215333242 in words is "one billion, two hundred fifteen million, three hundred thirty-three thousand, two hundred forty-two".