15211028889 has 45 divisors (see below), whose sum is σ = 25662462293. Its totient is φ = 8681656536.

The previous prime is 15211028849. The next prime is 15211028927. The reversal of 15211028889 is 98882011251.

The square root of 15211028889 is 123333.

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

15211028889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15211028889 - 2¹⁷ = 15210897817 is a prime.

It is a super-4 number, since 4×15211028889⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15211028849) 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 44 ways as a sum of consecutive naturals, for example, 18129532 + ... + 18130370.

Almost surely, 2^15211028889 is an apocalyptic number.

15211028889 is the 123333-rd square number.

15211028889 is the 61667-th centered octagonal number.

It is an amenable number.

15211028889 is a deficient number, since it is larger than the sum of its proper divisors (10451433404).

15211028889 is an frugal number, since it uses more digits than its factorization.

15211028889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

It can be divided in two parts, 152 and 11028889, that added together give a square (11029041 = 3321²).

The spelling of 15211028889 in words is "fifteen billion, two hundred eleven million, twenty-eight thousand, eight hundred eighty-nine".