228207661 has 8 divisors (see below), whose sum is σ = 250483104. Its totient is φ = 206187120.

The previous prime is 228207653. The next prime is 228207667. The reversal of 228207661 is 166702822.

228207661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 228207661 - 2³ = 228207653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228207667) 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, 61846 + ... + 65431.

It is an arithmetic number, because the mean of its divisors is an integer number (31310388).

Almost surely, 2^228207661 is an apocalyptic number.

It is an amenable number.

228207661 is a deficient number, since it is larger than the sum of its proper divisors (22275443).

228207661 is a wasteful number, since it uses less digits than its factorization.

228207661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127451.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 228207661 is about 15106.5436483664. The cubic root of 228207661 is about 611.0968896219.

The spelling of 228207661 in words is "two hundred twenty-eight million, two hundred seven thousand, six hundred sixty-one".