55220434 has 8 divisors (see below), whose sum is σ = 83126268. Its totient is φ = 27511680.

The previous prime is 55220419. The next prime is 55220491. The reversal of 55220434 is 43402255.

It can be written as a sum of positive squares in 2 ways, for example, as 54804409 + 416025 = 7403^2 + 645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×55220434² = 6098592662296712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55220399 and 55220408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48567 + ... + 49690.

Almost surely, 2^55220434 is an apocalyptic number.

55220434 is a deficient number, since it is larger than the sum of its proper divisors (27905834).

55220434 is a wasteful number, since it uses less digits than its factorization.

55220434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98540.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 55220434 is about 7431.0452831348. The cubic root of 55220434 is about 380.8026294527.

Adding to 55220434 its reverse (43402255), we get a palindrome (98622689).

The spelling of 55220434 in words is "fifty-five million, two hundred twenty thousand, four hundred thirty-four".