7125218722 has 4 divisors (see below), whose sum is σ = 10687828086. Its totient is φ = 3562609360.

The previous prime is 7125218719. The next prime is 7125218741. The reversal of 7125218722 is 2278125217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2278125217 = 17597 ⋅129461.

It can be written as a sum of positive squares in only one way, i.e., 4208246641 + 2916972081 = 64871^2 + 54009^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1781304679 + ... + 1781304682.

Almost surely, 2^7125218722 is an apocalyptic number.

7125218722 is a deficient number, since it is larger than the sum of its proper divisors (3562609364).

7125218722 is a wasteful number, since it uses less digits than its factorization.

7125218722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562609363.

The product of its digits is 31360, while the sum is 37.

The square root of 7125218722 is about 84411.0106680402. The cubic root of 7125218722 is about 1924.2702555390.

The spelling of 7125218722 in words is "seven billion, one hundred twenty-five million, two hundred eighteen thousand, seven hundred twenty-two".