228501591 has 8 divisors (see below), whose sum is σ = 306493824. Its totient is φ = 151421880.

The previous prime is 228501587. The next prime is 228501593. The reversal of 228501591 is 195105822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228501591 - 2² = 228501587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228501593) 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, 227545 + ... + 228546.

It is an arithmetic number, because the mean of its divisors is an integer number (38311728).

Almost surely, 2^228501591 is an apocalyptic number.

228501591 is a deficient number, since it is larger than the sum of its proper divisors (77992233).

228501591 is a wasteful number, since it uses less digits than its factorization.

228501591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456261.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 228501591 is about 15116.2690833420. The cubic root of 228501591 is about 611.3591400167.

The spelling of 228501591 in words is "two hundred twenty-eight million, five hundred one thousand, five hundred ninety-one".