7133156615209 has 3 divisors (see below), whose sum is σ = 7133159286007. Its totient is φ = 7133153944412.

The previous prime is 7133156615129. The next prime is 7133156615219. The reversal of 7133156615209 is 9025166513317.

The square root of 7133156615209 is 2670797.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 7124174883225 + 8981731984 = 2669115^2 + 94772^2 .

It is not a de Polignac number, because 7133156615209 - 2⁹ = 7133156614697 is a prime.

It is a super-2 number, since 2×7133156615209² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7133156615219) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1335399 + ... + 4006195.

Almost surely, 2^{7133156615209} is an apocalyptic number.

7133156615209 is the 2670797-th square number.

7133156615209 is the 1335399-th centered octagonal number.

It is an amenable number.

7133156615209 is a deficient number, since it is larger than the sum of its proper divisors (2670798).

7133156615209 is an frugal number, since it uses more digits than its factorization.

7133156615209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5341594 (or 2670797 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 49.

Multiplying 7133156615209 by its sum of digits (49), we get a square (349524674145241 = 18695579²).

The spelling of 7133156615209 in words is "seven trillion, one hundred thirty-three billion, one hundred fifty-six million, six hundred fifteen thousand, two hundred nine".