228851551 has 4 divisors (see below), whose sum is σ = 230013432. Its totient is φ = 227689672.

The previous prime is 228851489. The next prime is 228851573. The reversal of 228851551 is 155158822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228851551 - 2⁹ = 228851039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228851551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228851251) 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, 580645 + ... + 581038.

It is an arithmetic number, because the mean of its divisors is an integer number (57503358).

Almost surely, 2^228851551 is an apocalyptic number.

228851551 is a deficient number, since it is larger than the sum of its proper divisors (1161881).

228851551 is a wasteful number, since it uses less digits than its factorization.

228851551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161880.

The product of its digits is 32000, while the sum is 37.

The square root of 228851551 is about 15127.8402622450. The cubic root of 228851551 is about 611.6710884096.

The spelling of 228851551 in words is "two hundred twenty-eight million, eight hundred fifty-one thousand, five hundred fifty-one".