228573537 has 4 divisors (see below), whose sum is σ = 304764720. Its totient is φ = 152382356.

The previous prime is 228573533. The next prime is 228573539. The reversal of 228573537 is 735375822.

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 228573537 - 2² = 228573533 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228573533) 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, 38095587 + ... + 38095592.

It is an arithmetic number, because the mean of its divisors is an integer number (76191180).

Almost surely, 2^228573537 is an apocalyptic number.

It is an amenable number.

228573537 is a deficient number, since it is larger than the sum of its proper divisors (76191183).

228573537 is an equidigital number, since it uses as much as digits as its factorization.

228573537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76191182.

The product of its digits is 352800, while the sum is 42.

The square root of 228573537 is about 15118.6486499290. The cubic root of 228573537 is about 611.4232974535.

The spelling of 228573537 in words is "two hundred twenty-eight million, five hundred seventy-three thousand, five hundred thirty-seven".