1215440152 has 16 divisors (see below), whose sum is σ = 2378035440. Its totient is φ = 581297376.

The previous prime is 1215440119. The next prime is 1215440153. The reversal of 1215440152 is 2510445121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215440153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3302643 + ... + 3303010.

It is an arithmetic number, because the mean of its divisors is an integer number (148627215).

Almost surely, 2^1215440152 is an apocalyptic number.

It is an amenable number.

1215440152 is a deficient number, since it is larger than the sum of its proper divisors (1162595288).

1215440152 is a wasteful number, since it uses less digits than its factorization.

1215440152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6605682 (or 6605678 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1215440152 is about 34863.1632529236. The cubic root of 1215440152 is about 1067.1968295930.

Adding to 1215440152 its reverse (2510445121), we get a palindrome (3725885273).

The spelling of 1215440152 in words is "one billion, two hundred fifteen million, four hundred forty thousand, one hundred fifty-two".