172700551 has 4 divisors (see below), whose sum is σ = 172811232. Its totient is φ = 172589872.

The previous prime is 172700543. The next prime is 172700573. The reversal of 172700551 is 155007271.

172700551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155007271 = 71 ⋅2183201.

It is a cyclic number.

It is not a de Polignac number, because 172700551 - 2³ = 172700543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172700531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52966 + ... + 56131.

It is an arithmetic number, because the mean of its divisors is an integer number (43202808).

Almost surely, 2^172700551 is an apocalyptic number.

172700551 is a deficient number, since it is larger than the sum of its proper divisors (110681).

172700551 is a wasteful number, since it uses less digits than its factorization.

172700551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110680.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 172700551 is about 13141.5581648448. The cubic root of 172700551 is about 556.8837873601.

The spelling of 172700551 in words is "one hundred seventy-two million, seven hundred thousand, five hundred fifty-one".