55220426 has 8 divisors (see below), whose sum is σ = 83293920. Its totient is φ = 27455788.

The previous prime is 55220419. The next prime is 55220491. The reversal of 55220426 is 62402255.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55220395 and 55220404.

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, 76766 + ... + 77481.

It is an arithmetic number, because the mean of its divisors is an integer number (10411740).

Almost surely, 2^55220426 is an apocalyptic number.

55220426 is a deficient number, since it is larger than the sum of its proper divisors (28073494).

55220426 is a wasteful number, since it uses less digits than its factorization.

55220426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154428.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 55220426 is about 7431.0447448525. The cubic root of 55220426 is about 380.8026110633.

The spelling of 55220426 in words is "fifty-five million, two hundred twenty thousand, four hundred twenty-six".