240516221 has 16 divisors (see below), whose sum is σ = 289899648. Its totient is φ = 196838400.

The previous prime is 240516217. The next prime is 240516223. The reversal of 240516221 is 122615042.

It is a happy number.

It is not a de Polignac number, because 240516221 - 2² = 240516217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240516223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23660 + ... + 32261.

It is an arithmetic number, because the mean of its divisors is an integer number (18118728).

Almost surely, 2^240516221 is an apocalyptic number.

It is an amenable number.

240516221 is a deficient number, since it is larger than the sum of its proper divisors (49383427).

240516221 is a wasteful number, since it uses less digits than its factorization.

240516221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55972.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 240516221 is about 15508.5853964828. The cubic root of 240516221 is about 621.8917428587.

The spelling of 240516221 in words is "two hundred forty million, five hundred sixteen thousand, two hundred twenty-one".