228111501 has 4 divisors (see below), whose sum is σ = 304148672. Its totient is φ = 152074332.

The previous prime is 228111469. The next prime is 228111503. The reversal of 228111501 is 105111822.

228111501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 228111501 - 2⁵ = 228111469 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 (228111503) 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, 38018581 + ... + 38018586.

It is an arithmetic number, because the mean of its divisors is an integer number (76037168).

Almost surely, 2^228111501 is an apocalyptic number.

It is an amenable number.

228111501 is a deficient number, since it is larger than the sum of its proper divisors (76037171).

228111501 is an equidigital number, since it uses as much as digits as its factorization.

228111501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76037170.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 228111501 is about 15103.3605863066. The cubic root of 228111501 is about 611.0110448081.

The spelling of 228111501 in words is "two hundred twenty-eight million, one hundred eleven thousand, five hundred one".