7121228537 has 4 divisors (see below), whose sum is σ = 7121864016. Its totient is φ = 7120593060.

The previous prime is 7121228497. The next prime is 7121228567. The reversal of 7121228537 is 7358221217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7121228537 - 2⁸ = 7121228281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7121228537.

It is not an unprimeable number, because it can be changed into a prime (7121228567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300623 + ... + 323444.

It is an arithmetic number, because the mean of its divisors is an integer number (1780466004).

Almost surely, 2^7121228537 is an apocalyptic number.

It is an amenable number.

7121228537 is a deficient number, since it is larger than the sum of its proper divisors (635479).

7121228537 is a wasteful number, since it uses less digits than its factorization.

7121228537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635478.

The product of its digits is 47040, while the sum is 38.

The square root of 7121228537 is about 84387.3719048058. The cubic root of 7121228537 is about 1923.9109857238.

The spelling of 7121228537 in words is "seven billion, one hundred twenty-one million, two hundred twenty-eight thousand, five hundred thirty-seven".