172272820530551 has 8 divisors (see below), whose sum is σ = 185529083822544. Its totient is φ = 159017201219520.

The previous prime is 172272820530523. The next prime is 172272820530563. The reversal of 172272820530551 is 155035028272271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172272820530551 - 2¹⁸ = 172272820268407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172272820530551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172272820538551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160439561 + ... + 161509746.

It is an arithmetic number, because the mean of its divisors is an integer number (23191135477818).

Almost surely, 2^{172272820530551} is an apocalyptic number.

172272820530551 is a deficient number, since it is larger than the sum of its proper divisors (13256263291993).

172272820530551 is a wasteful number, since it uses less digits than its factorization.

172272820530551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321990481.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 172272820530551 in words is "one hundred seventy-two trillion, two hundred seventy-two billion, eight hundred twenty million, five hundred thirty thousand, five hundred fifty-one".