228049631 has 4 divisors (see below), whose sum is σ = 228350064. Its totient is φ = 227749200.

The previous prime is 228049603. The next prime is 228049639. The reversal of 228049631 is 136940822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136940822 = 2 ⋅68470411.

It is a cyclic number.

It is not a de Polignac number, because 228049631 - 2⁶ = 228049567 is a prime.

It is a super-2 number, since 2×228049631² = 104013268398472322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228049591 and 228049600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228049639) 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, 149075 + ... + 150596.

It is an arithmetic number, because the mean of its divisors is an integer number (57087516).

Almost surely, 2^228049631 is an apocalyptic number.

228049631 is a deficient number, since it is larger than the sum of its proper divisors (300433).

228049631 is an equidigital number, since it uses as much as digits as its factorization.

228049631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300432.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 228049631 is about 15101.3122277503. The cubic root of 228049631 is about 610.9557989138.

The spelling of 228049631 in words is "two hundred twenty-eight million, forty-nine thousand, six hundred thirty-one".