228377661 has 4 divisors (see below), whose sum is σ = 304503552. Its totient is φ = 152251772.

The previous prime is 228377659. The next prime is 228377683. The reversal of 228377661 is 166773822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228377661 - 2¹ = 228377659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228377641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38062941 + ... + 38062946.

It is an arithmetic number, because the mean of its divisors is an integer number (76125888).

Almost surely, 2^228377661 is an apocalyptic number.

It is an amenable number.

228377661 is a deficient number, since it is larger than the sum of its proper divisors (76125891).

228377661 is an equidigital number, since it uses as much as digits as its factorization.

228377661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76125890.

The product of its digits is 169344, while the sum is 42.

The square root of 228377661 is about 15112.1693015927. The cubic root of 228377661 is about 611.2485945577.

The spelling of 228377661 in words is "two hundred twenty-eight million, three hundred seventy-seven thousand, six hundred sixty-one".