55542205 has 4 divisors (see below), whose sum is σ = 66650652. Its totient is φ = 44433760.

The previous prime is 55542199. The next prime is 55542211. The reversal of 55542205 is 50224555.

55542205 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50224555 = 5 ⋅10044911.

It is an interprime number because it is at equal distance from previous prime (55542199) and next prime (55542211).

It can be written as a sum of positive squares in 2 ways, for example, as 13823524 + 41718681 = 3718^2 + 6459^2 .

It is not a de Polignac number, because 55542205 - 2²¹ = 53445053 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5554216 + ... + 5554225.

It is an arithmetic number, because the mean of its divisors is an integer number (16662663).

Almost surely, 2^55542205 is an apocalyptic number.

It is an amenable number.

55542205 is a deficient number, since it is larger than the sum of its proper divisors (11108447).

55542205 is a wasteful number, since it uses less digits than its factorization.

55542205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11108446.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55542205 is about 7452.6642886957. The cubic root of 55542205 is about 381.5408465936.

The spelling of 55542205 in words is "fifty-five million, five hundred forty-two thousand, two hundred five".