172551942 has 48 divisors (see below), whose sum is σ = 388070592. Its totient is φ = 55365120.

The previous prime is 172551919. The next prime is 172551961. The reversal of 172551942 is 249155271.

172551942 is a `hidden beast` number, since 17 + 2 + 551 + 94 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 172551897 and 172551906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63267 + ... + 65937.

It is an arithmetic number, because the mean of its divisors is an integer number (8084804).

Almost surely, 2^172551942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172551942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194035296).

172551942 is an abundant number, since it is smaller than the sum of its proper divisors (215518650).

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

172551942 is a wasteful number, since it uses less digits than its factorization.

172551942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813 (or 2810 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 172551942 is about 13135.9027858766. The cubic root of 172551942 is about 556.7240084994.

The spelling of 172551942 in words is "one hundred seventy-two million, five hundred fifty-one thousand, nine hundred forty-two".