55722205 has 32 divisors (see below), whose sum is σ = 84250368. Its totient is φ = 34368000.

The previous prime is 55722203. The next prime is 55722223. The reversal of 55722205 is 50222755.

It is not a de Polignac number, because 55722205 - 2¹ = 55722203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55722203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38169 + ... + 39601.

It is an arithmetic number, because the mean of its divisors is an integer number (2632824).

Almost surely, 2^55722205 is an apocalyptic number.

55722205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55722205 is a deficient number, since it is larger than the sum of its proper divisors (28528163).

55722205 is a wasteful number, since it uses less digits than its factorization.

55722205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 55722205 is about 7464.7307386134. The cubic root of 55722205 is about 381.9525653115.

It can be divided in two parts, 5572 and 2205, that added together give a palindrome (7777).

The spelling of 55722205 in words is "fifty-five million, seven hundred twenty-two thousand, two hundred five".