1215225153 has 16 divisors (see below), whose sum is σ = 1813291200. Its totient is φ = 804319200.

The previous prime is 1215225149. The next prime is 1215225173. The reversal of 1215225153 is 3515225121.

1215225153 is a `hidden beast` number, since 121 + 5 + 22 + 515 + 3 = 666.

It is not a de Polignac number, because 1215225153 - 2² = 1215225149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1215225173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158148 + ... + 165653.

It is an arithmetic number, because the mean of its divisors is an integer number (113330700).

Almost surely, 2^1215225153 is an apocalyptic number.

It is an amenable number.

1215225153 is a deficient number, since it is larger than the sum of its proper divisors (598066047).

1215225153 is a wasteful number, since it uses less digits than its factorization.

1215225153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323949 (or 323943 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1215225153 is about 34860.0796470691. The cubic root of 1215225153 is about 1067.1339004610.

The spelling of 1215225153 in words is "one billion, two hundred fifteen million, two hundred twenty-five thousand, one hundred fifty-three".