5171220 has 36 divisors (see below), whose sum is σ = 15686580. Its totient is φ = 1378944.

The previous prime is 5171209. The next prime is 5171237. The reversal of 5171220 is 221715.

It can be written as a sum of positive squares in 2 ways, for example, as 1887876 + 3283344 = 1374^2 + 1812^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 5171193 and 5171202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14185 + ... + 14544.

Almost surely, 2^5171220 is an apocalyptic number.

It is an amenable number.

5171220 is an abundant number, since it is smaller than the sum of its proper divisors (10515360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5171220 is a wasteful number, since it uses less digits than its factorization.

5171220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28744 (or 28739 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 5171220 is about 2274.0316620487. The cubic root of 5171220 is about 172.9276095718.

Adding to 5171220 its reverse (221715), we get a palindrome (5392935).

The spelling of 5171220 in words is "five million, one hundred seventy-one thousand, two hundred twenty".