1215317133 has 12 divisors (see below), whose sum is σ = 1802903388. Its totient is φ = 788313600.

The previous prime is 1215317107. The next prime is 1215317137. The reversal of 1215317133 is 3317135121.

It is a happy number.

1215317133 is a `hidden beast` number, since 1 + 215 + 317 + 133 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1129161609 + 86155524 = 33603^2 + 9282^2 .

It is not a de Polignac number, because 1215317133 - 2⁵ = 1215317101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215317097 and 1215317106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215317137) 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 11 ways as a sum of consecutive naturals, for example, 1824468 + ... + 1825133.

It is an arithmetic number, because the mean of its divisors is an integer number (150241949).

Almost surely, 2^1215317133 is an apocalyptic number.

It is an amenable number.

1215317133 is a deficient number, since it is larger than the sum of its proper divisors (587586255).

1215317133 is a wasteful number, since it uses less digits than its factorization.

1215317133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649644 (or 3649641 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 1215317133 is about 34861.3988962004. The cubic root of 1215317133 is about 1067.1608234554.

The spelling of 1215317133 in words is "one billion, two hundred fifteen million, three hundred seventeen thousand, one hundred thirty-three".