221725077 has 16 divisors (see below), whose sum is σ = 341665920. Its totient is φ = 125275392.

The previous prime is 221725013. The next prime is 221725081. The reversal of 221725077 is 770527122.

221725077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221725077 - 2⁶ = 221725013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221725087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57448 + ... + 61185.

It is an arithmetic number, because the mean of its divisors is an integer number (21354120).

Almost surely, 2^221725077 is an apocalyptic number.

It is an amenable number.

221725077 is a deficient number, since it is larger than the sum of its proper divisors (119940843).

221725077 is a wasteful number, since it uses less digits than its factorization.

221725077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118732.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 221725077 is about 14890.4357558803. The cubic root of 221725077 is about 605.2548406170.

The spelling of 221725077 in words is "two hundred twenty-one million, seven hundred twenty-five thousand, seventy-seven".