7247557145 has 4 divisors (see below), whose sum is σ = 8697068580. Its totient is φ = 5798045712.

The previous prime is 7247557129. The next prime is 7247557237. The reversal of 7247557145 is 5417557427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1598080576 + 5649476569 = 39976^2 + 75163^2 .

It is a cyclic number.

It is not a de Polignac number, because 7247557145 - 2⁴ = 7247557129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7247557145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724755710 + ... + 724755719.

It is an arithmetic number, because the mean of its divisors is an integer number (2174267145).

Almost surely, 2^7247557145 is an apocalyptic number.

It is an amenable number.

7247557145 is a deficient number, since it is larger than the sum of its proper divisors (1449511435).

7247557145 is a wasteful number, since it uses less digits than its factorization.

7247557145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449511434.

The product of its digits is 1372000, while the sum is 47.

The square root of 7247557145 is about 85132.5856825693. The cubic root of 7247557145 is about 1935.2209168057.

The spelling of 7247557145 in words is "seven billion, two hundred forty-seven million, five hundred fifty-seven thousand, one hundred forty-five".