7425222721 has 8 divisors (see below), whose sum is σ = 8486824640. Its totient is φ = 6363834768.

The previous prime is 7425222709. The next prime is 7425222731. The reversal of 7425222721 is 1272225247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7425222721 - 2⁷ = 7425222593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7425222731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29455 + ... + 125371.

It is an arithmetic number, because the mean of its divisors is an integer number (1060853080).

Almost surely, 2^7425222721 is an apocalyptic number.

It is an amenable number.

7425222721 is a deficient number, since it is larger than the sum of its proper divisors (1061601919).

7425222721 is a wasteful number, since it uses less digits than its factorization.

7425222721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106983.

The product of its digits is 31360, while the sum is 34.

The square root of 7425222721 is about 86169.7320466996. The cubic root of 7425222721 is about 1950.9066764139.

Adding to 7425222721 its reverse (1272225247), we get a palindrome (8697447968).

The spelling of 7425222721 in words is "seven billion, four hundred twenty-five million, two hundred twenty-two thousand, seven hundred twenty-one".