1215506181933 has 16 divisors (see below), whose sum is σ = 1804760496000. Its totient is φ = 808532686080.

The previous prime is 1215506181919. The next prime is 1215506181997. The reversal of 1215506181933 is 3391816055121.

1215506181933 is a `hidden beast` number, since 1 + 2 + 1 + 550 + 6 + 1 + 8 + 1 + 93 + 3 = 666.

It is not a de Polignac number, because 1215506181933 - 2³⁷ = 1078067228461 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215506181833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50120113 + ... + 50144358.

It is an arithmetic number, because the mean of its divisors is an integer number (112797531000).

Almost surely, 2^{1215506181933} is an apocalyptic number.

It is an amenable number.

1215506181933 is a deficient number, since it is larger than the sum of its proper divisors (589254314067).

1215506181933 is a wasteful number, since it uses less digits than its factorization.

1215506181933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100264929 (or 100264923 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 1215506181933 in words is "one trillion, two hundred fifteen billion, five hundred six million, one hundred eighty-one thousand, nine hundred thirty-three".