340221725 has 12 divisors (see below), whose sum is σ = 422770560. Its totient is φ = 271599600.

The previous prime is 340221691. The next prime is 340221737. The reversal of 340221725 is 527122043.

It is not a de Polignac number, because 340221725 - 2¹⁰ = 340220701 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 340221694 and 340221703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2231 + ... + 26180.

It is an arithmetic number, because the mean of its divisors is an integer number (35230880).

Almost surely, 2^340221725 is an apocalyptic number.

It is an amenable number.

340221725 is a deficient number, since it is larger than the sum of its proper divisors (82548835).

340221725 is a wasteful number, since it uses less digits than its factorization.

340221725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28900 (or 28895 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 340221725 is about 18445.1002979111. The cubic root of 340221725 is about 698.1048910110.

Adding to 340221725 its reverse (527122043), we get a palindrome (867343768).

The spelling of 340221725 in words is "three hundred forty million, two hundred twenty-one thousand, seven hundred twenty-five".