240431221 has 8 divisors (see below), whose sum is σ = 254752344. Its totient is φ = 226129920.

The previous prime is 240431209. The next prime is 240431231. The reversal of 240431221 is 122134042.

240431221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 44823025 + 195608196 = 6695^2 + 13986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240431221 - 2¹⁷ = 240300149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240431201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25381 + ... + 33541.

It is an arithmetic number, because the mean of its divisors is an integer number (31844043).

Almost surely, 2^240431221 is an apocalyptic number.

It is an amenable number.

240431221 is a deficient number, since it is larger than the sum of its proper divisors (14321123).

240431221 is a wasteful number, since it uses less digits than its factorization.

240431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9911.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 240431221 is about 15505.8447367436. The cubic root of 240431221 is about 621.8184740285.

Adding to 240431221 its reverse (122134042), we get a palindrome (362565263).

The spelling of 240431221 in words is "two hundred forty million, four hundred thirty-one thousand, two hundred twenty-one".