172142550 has 96 divisors (see below), whose sum is σ = 490816800. Its totient is φ = 44311680.

The previous prime is 172142539. The next prime is 172142573. The reversal of 172142550 is 55241271.

172142550 is a `hidden beast` number, since 1 + 72 + 1 + 42 + 550 = 666.

It is a super-3 number, since 3×172142550³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 36952 + ... + 41348.

It is an arithmetic number, because the mean of its divisors is an integer number (5112675).

Almost surely, 2^172142550 is an apocalyptic number.

172142550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172142550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245408400).

172142550 is an abundant number, since it is smaller than the sum of its proper divisors (318674250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172142550 is a wasteful number, since it uses less digits than its factorization.

172142550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447 (or 4436 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 172142550 is about 13120.3105908359. The cubic root of 172142550 is about 556.2833704678.

The spelling of 172142550 in words is "one hundred seventy-two million, one hundred forty-two thousand, five hundred fifty".