55820169 has 12 divisors (see below), whose sum is σ = 80694900. Its totient is φ = 37183104.

The previous prime is 55820159. The next prime is 55820201. The reversal of 55820169 is 96102855.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20358144 + 35462025 = 4512^2 + 5955^2 .

It is not a de Polignac number, because 55820169 - 2⁵ = 55820137 is a prime.

It is a super-2 number, since 2×55820169² = 6231782534377122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55820159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17317 + ... + 20285.

It is an arithmetic number, because the mean of its divisors is an integer number (6724575).

Almost surely, 2^55820169 is an apocalyptic number.

It is an amenable number.

55820169 is a deficient number, since it is larger than the sum of its proper divisors (24874731).

55820169 is a wasteful number, since it uses less digits than its factorization.

55820169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 55820169 is about 7471.2896477114. The cubic root of 55820169 is about 382.1762684403.

The spelling of 55820169 in words is "fifty-five million, eight hundred twenty thousand, one hundred sixty-nine".