15502217221172 has 24 divisors (see below), whose sum is σ = 29640051191520. Its totient is φ = 7035769700960.

The previous prime is 15502217221163. The next prime is 15502217221247. The reversal of 15502217221172 is 27112271220551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267287483 + ... + 267345474.

It is an arithmetic number, because the mean of its divisors is an integer number (1235002132980).

Almost surely, 2^{15502217221172} is an apocalyptic number.

It is an amenable number.

15502217221172 is a deficient number, since it is larger than the sum of its proper divisors (14137833970348).

15502217221172 is a wasteful number, since it uses less digits than its factorization.

15502217221172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534633631 (or 534633629 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 38.

The spelling of 15502217221172 in words is "fifteen trillion, five hundred two billion, two hundred seventeen million, two hundred twenty-one thousand, one hundred seventy-two".