203172240 has 80 divisors (see below), whose sum is σ = 631209600. Its totient is φ = 54061056.

The previous prime is 203172191. The next prime is 203172241. The reversal of 203172240 is 42271302.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (203172241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200856 + ... + 201864.

It is an arithmetic number, because the mean of its divisors is an integer number (7890120).

Almost surely, 2^203172240 is an apocalyptic number.

203172240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203172240 is an abundant number, since it is smaller than the sum of its proper divisors (428037360).

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

203172240 is a wasteful number, since it uses less digits than its factorization.

203172240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 203172240 is about 14253.8500062264. The cubic root of 203172240 is about 587.8792384700.

The spelling of 203172240 in words is "two hundred three million, one hundred seventy-two thousand, two hundred forty".