172241856 has 112 divisors (see below), whose sum is σ = 509625600. Its totient is φ = 57044736.

The previous prime is 172241843. The next prime is 172241869. The reversal of 172241856 is 658142271.

It is an interprime number because it is at equal distance from previous prime (172241843) and next prime (172241869).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 172241856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454275 + ... + 454653.

Almost surely, 2^172241856 is an apocalyptic number.

172241856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172241856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254812800).

172241856 is an abundant number, since it is smaller than the sum of its proper divisors (337383744).

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

172241856 is a wasteful number, since it uses less digits than its factorization.

172241856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 647 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 172241856 is about 13124.0944830491. The cubic root of 172241856 is about 556.3903199253.

The spelling of 172241856 in words is "one hundred seventy-two million, two hundred forty-one thousand, eight hundred fifty-six".