345025221 has 16 divisors (see below), whose sum is σ = 465875520. Its totient is φ = 227111040.

The previous prime is 345025193. The next prime is 345025243. The reversal of 345025221 is 122520543.

It is not a de Polignac number, because 345025221 - 2¹⁴ = 345008837 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 345025191 and 345025200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345025271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100666 + ... + 104036.

It is an arithmetic number, because the mean of its divisors is an integer number (29117220).

Almost surely, 2^345025221 is an apocalyptic number.

It is an amenable number.

345025221 is a deficient number, since it is larger than the sum of its proper divisors (120850299).

345025221 is a wasteful number, since it uses less digits than its factorization.

345025221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 345025221 is about 18574.8545350966. The cubic root of 345025221 is about 701.3749987043.

Adding to 345025221 its reverse (122520543), we get a palindrome (467545764).

The spelling of 345025221 in words is "three hundred forty-five million, twenty-five thousand, two hundred twenty-one".