172231240 has 16 divisors (see below), whose sum is σ = 387520380. Its totient is φ = 68892480.

The previous prime is 172231237. The next prime is 172231247. The reversal of 172231240 is 42132271.

It can be written as a sum of positive squares in 2 ways, for example, as 153412996 + 18818244 = 12386^2 + 4338^2 .

It is not an unprimeable number, because it can be changed into a prime (172231247) 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, 2152851 + ... + 2152930.

Almost surely, 2^172231240 is an apocalyptic number.

172231240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172231240 is an abundant number, since it is smaller than the sum of its proper divisors (215289140).

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

172231240 is a wasteful number, since it uses less digits than its factorization.

172231240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305792 (or 4305788 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 172231240 is about 13123.6900298658. The cubic root of 172231240 is about 556.3788887879.

The spelling of 172231240 in words is "one hundred seventy-two million, two hundred thirty-one thousand, two hundred forty".