340024221 has 6 divisors (see below), whose sum is σ = 491146110. Its totient is φ = 226682808.

The previous prime is 340024199. The next prime is 340024229. The reversal of 340024221 is 122420043.

340024221 is a `hidden beast` number, since 3 + 400 + 242 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 319908996 + 20115225 = 17886^2 + 4485^2 .

It is not a de Polignac number, because 340024221 - 2⁷ = 340024093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340024194 and 340024203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340024229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18890226 + ... + 18890243.

It is an arithmetic number, because the mean of its divisors is an integer number (81857685).

Almost surely, 2^340024221 is an apocalyptic number.

It is an amenable number.

340024221 is a deficient number, since it is larger than the sum of its proper divisors (151121889).

340024221 is a wasteful number, since it uses less digits than its factorization.

340024221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37780475 (or 37780472 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 340024221 is about 18439.7456869665. The cubic root of 340024221 is about 697.9697779489.

Adding to 340024221 its reverse (122420043), we get a palindrome (462444264).

The spelling of 340024221 in words is "three hundred forty million, twenty-four thousand, two hundred twenty-one".