Search a number
15202201 = 725572
BaseRepresentation
bin111001111111…
…011110011001
31001121100111111
4321333132121
512342432301
61301500321
7243134200
oct71773631
931540444
1015202201
118643703
1251116a1
1331c36b1
14203a237
151504551
hexe7f799

15202201 has 9 divisors (see below), whose sum is σ = 17715999. Its totient is φ = 13007064.

The previous prime is 15202193. The next prime is 15202211. The reversal of 15202201 is 10220251.

The square root of 15202201 is 3899.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 13868176 = 1155^2 + 3724^2 .

It is not a de Polignac number, because 15202201 - 23 = 15202193 is a prime.

It is a super-2 number, since 2×152022012 = 462213830488802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15202211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27015 + ... + 27571.

Almost surely, 215202201 is an apocalyptic number.

15202201 is the 3899-th square number.

15202201 is the 1950-th centered octagonal number.

It is an amenable number.

15202201 is a deficient number, since it is larger than the sum of its proper divisors (2513798).

15202201 is an frugal number, since it uses more digits than its factorization.

15202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The cubic root of 15202201 is about 247.7244218213.

Adding to 15202201 its reverse (10220251), we get a palindrome (25422452).

It can be divided in two parts, 1520 and 2201, that added together give a square (3721 = 612).

The spelling of 15202201 in words is "fifteen million, two hundred two thousand, two hundred one".