172421417115 has 48 divisors (see below), whose sum is σ = 300827673120. Its totient is φ = 91354314240.

The previous prime is 172421417101. The next prime is 172421417209. The reversal of 172421417115 is 511714124271.

It is not a de Polignac number, because 172421417115 - 2¹⁰ = 172421416091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172421417115.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25881885 + ... + 25888545.

It is an arithmetic number, because the mean of its divisors is an integer number (6267243190).

Almost surely, 2^172421417115 is an apocalyptic number.

172421417115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172421417115 is a deficient number, since it is larger than the sum of its proper divisors (128406256005).

172421417115 is a wasteful number, since it uses less digits than its factorization.

172421417115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364 (or 10361 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The spelling of 172421417115 in words is "one hundred seventy-two billion, four hundred twenty-one million, four hundred seventeen thousand, one hundred fifteen".