55220117 has 4 divisors (see below), whose sum is σ = 56262060. Its totient is φ = 54178176.

The previous prime is 55220107. The next prime is 55220141. The reversal of 55220117 is 71102255.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47458321 + 7761796 = 6889^2 + 2786^2 .

It is a cyclic number.

It is not a de Polignac number, because 55220117 - 2⁴ = 55220101 is a prime.

It is a super-2 number, since 2×55220117² = 6098522642987378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55220092 and 55220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55220107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520892 + ... + 520997.

It is an arithmetic number, because the mean of its divisors is an integer number (14065515).

Almost surely, 2^55220117 is an apocalyptic number.

It is an amenable number.

55220117 is a deficient number, since it is larger than the sum of its proper divisors (1041943).

55220117 is a wasteful number, since it uses less digits than its factorization.

55220117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041942.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 55220117 is about 7431.0239536688. The cubic root of 55220117 is about 380.8019007692.

The spelling of 55220117 in words is "fifty-five million, two hundred twenty thousand, one hundred seventeen".