7721022725 has 36 divisors (see below), whose sum is σ = 10392209856. Its totient is φ = 5687922240.

The previous prime is 7721022721. The next prime is 7721022731. The reversal of 7721022725 is 5272201277.

7721022725 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7721022725 - 2² = 7721022721 is a prime.

It is a super-2 number, since 2×7721022725² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721022721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1954202 + ... + 1958148.

It is an arithmetic number, because the mean of its divisors is an integer number (288672496).

Almost surely, 2^7721022725 is an apocalyptic number.

It is an amenable number.

7721022725 is a deficient number, since it is larger than the sum of its proper divisors (2671187131).

7721022725 is a wasteful number, since it uses less digits than its factorization.

7721022725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446 (or 4428 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 7721022725 is about 87869.3503162508. The cubic root of 7721022725 is about 1976.4762961951.

The spelling of 7721022725 in words is "seven billion, seven hundred twenty-one million, twenty-two thousand, seven hundred twenty-five".