240861221 has 4 divisors (see below), whose sum is σ = 251333472. Its totient is φ = 230388972.

The previous prime is 240861217. The next prime is 240861223. The reversal of 240861221 is 122168042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240861221 - 2² = 240861217 is a prime.

It is a super-2 number, since 2×240861221² = 116028255563221682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240861223) 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, 5236091 + ... + 5236136.

It is an arithmetic number, because the mean of its divisors is an integer number (62833368).

Almost surely, 2^240861221 is an apocalyptic number.

It is an amenable number.

240861221 is a deficient number, since it is larger than the sum of its proper divisors (10472251).

240861221 is a wasteful number, since it uses less digits than its factorization.

240861221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10472250.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 240861221 is about 15519.7042819765. The cubic root of 240861221 is about 622.1889510141.

The spelling of 240861221 in words is "two hundred forty million, eight hundred sixty-one thousand, two hundred twenty-one".