172553505 has 8 divisors (see below), whose sum is σ = 276085632. Its totient is φ = 92028528.

The previous prime is 172553477. The next prime is 172553527. The reversal of 172553505 is 505355271.

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

It is not a de Polignac number, because 172553505 - 2¹⁰ = 172552481 is a prime.

It is a super-3 number, since 3×172553505³ (a number of 26 digits) contains 333 as substring.

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, 5751769 + ... + 5751798.

It is an arithmetic number, because the mean of its divisors is an integer number (34510704).

Almost surely, 2^172553505 is an apocalyptic number.

172553505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172553505 is a deficient number, since it is larger than the sum of its proper divisors (103532127).

172553505 is a wasteful number, since it uses less digits than its factorization.

172553505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11503575.

The product of its (nonzero) digits is 26250, while the sum is 33.

The square root of 172553505 is about 13135.9622791785. The cubic root of 172553505 is about 556.7256894560.

The spelling of 172553505 in words is "one hundred seventy-two million, five hundred fifty-three thousand, five hundred five".