7121506550 has 96 divisors (see below), whose sum is σ = 14466895488. Its totient is φ = 2597253120.

The previous prime is 7121506541. The next prime is 7121506573. The reversal of 7121506550 is 556051217.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 11541842 + ... + 11542458.

It is an arithmetic number, because the mean of its divisors is an integer number (150696828).

Almost surely, 2^7121506550 is an apocalyptic number.

7121506550 is an abundant number, since it is smaller than the sum of its proper divisors (7345388938).

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

7121506550 is a wasteful number, since it uses less digits than its factorization.

7121506550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 7121506550 is about 84389.0191316382. The cubic root of 7121506550 is about 1923.9360219144.

Adding to 7121506550 its reverse (556051217), we get a palindrome (7677557767).

The spelling of 7121506550 in words is "seven billion, one hundred twenty-one million, five hundred six thousand, five hundred fifty".