5261220172 has 24 divisors (see below), whose sum is σ = 9950440976. Its totient is φ = 2419668288.

The previous prime is 5261220127. The next prime is 5261220191. The reversal of 5261220172 is 2710221625.

It is a self number, because there is not a number n which added to its sum of digits gives 5261220172.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164043 + ... + 193474.

Almost surely, 2^5261220172 is an apocalyptic number.

5261220172 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

5261220172 is a deficient number, since it is larger than the sum of its proper divisors (4689220804).

5261220172 is a wasteful number, since it uses less digits than its factorization.

5261220172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357817 (or 357815 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 5261220172 is about 72534.2689492353. The cubic root of 5261220172 is about 1739.2505880096.

Adding to 5261220172 its reverse (2710221625), we get a palindrome (7971441797).

The spelling of 5261220172 in words is "five billion, two hundred sixty-one million, two hundred twenty thousand, one hundred seventy-two".