2221777725 has 48 divisors (see below), whose sum is σ = 3839545920. Its totient is φ = 1132185600.

The previous prime is 2221777717. The next prime is 2221777729. The reversal of 2221777725 is 5277771222.

2221777725 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2221777725 - 2³ = 2221777717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221777729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 205710 + ... + 216240.

It is an arithmetic number, because the mean of its divisors is an integer number (79990540).

Almost surely, 2^2221777725 is an apocalyptic number.

2221777725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2221777725 is a deficient number, since it is larger than the sum of its proper divisors (1617768195).

2221777725 is a wasteful number, since it uses less digits than its factorization.

2221777725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10670 (or 10665 counting only the distinct ones).

The product of its digits is 192080, while the sum is 42.

The square root of 2221777725 is about 47135.7372383206. The cubic root of 2221777725 is about 1304.8688671982.

The spelling of 2221777725 in words is "two billion, two hundred twenty-one million, seven hundred seventy-seven thousand, seven hundred twenty-five".