1215405225153 has 64 divisors (see below), whose sum is σ = 2237766520320. Its totient is φ = 635996676096.

The previous prime is 1215405225149. The next prime is 1215405225173. The reversal of 1215405225153 is 3515225045121.

1215405225153 is a `hidden beast` number, since 1 + 2 + 15 + 405 + 225 + 15 + 3 = 666.

It is not a de Polignac number, because 1215405225153 - 2² = 1215405225149 is a prime.

It is a super-2 number, since 2×1215405225153² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1215405225113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4992976 + ... + 5230737.

It is an arithmetic number, because the mean of its divisors is an integer number (34965101880).

Almost surely, 2^{1215405225153} is an apocalyptic number.

It is an amenable number.

1215405225153 is a deficient number, since it is larger than the sum of its proper divisors (1022361295167).

1215405225153 is a wasteful number, since it uses less digits than its factorization.

1215405225153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10223783 (or 10223777 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 1215405225153 in words is "one trillion, two hundred fifteen billion, four hundred five million, two hundred twenty-five thousand, one hundred fifty-three".