220340425 has 12 divisors (see below), whose sum is σ = 273966220. Its totient is φ = 175792320.

The previous prime is 220340399. The next prime is 220340431. The reversal of 220340425 is 524043022.

It can be written as a sum of positive squares in 6 ways, for example, as 42198016 + 178142409 = 6496^2 + 13347^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220340425 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220340396 and 220340405.

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, 2490 + ... + 21139.

Almost surely, 2^220340425 is an apocalyptic number.

220340425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220340425 is a deficient number, since it is larger than the sum of its proper divisors (53625795).

220340425 is a wasteful number, since it uses less digits than its factorization.

220340425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24012 (or 24007 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 220340425 is about 14843.8682626868. The cubic root of 220340425 is about 603.9922891652.

Adding to 220340425 its reverse (524043022), we get a palindrome (744383447).

The spelling of 220340425 in words is "two hundred twenty million, three hundred forty thousand, four hundred twenty-five".