228142831 has 4 divisors (see below), whose sum is σ = 260734672. Its totient is φ = 195550992.

The previous prime is 228142829. The next prime is 228142843. The reversal of 228142831 is 138241822.

It is a happy number.

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

It is not a de Polignac number, because 228142831 - 2¹ = 228142829 is a prime.

It is a super-2 number, since 2×228142831² = 104098302673389122, 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 = 228142793 and 228142802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228142331) 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, 16295910 + ... + 16295923.

It is an arithmetic number, because the mean of its divisors is an integer number (65183668).

Almost surely, 2^228142831 is an apocalyptic number.

228142831 is a deficient number, since it is larger than the sum of its proper divisors (32591841).

228142831 is an equidigital number, since it uses as much as digits as its factorization.

228142831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32591840.

The product of its digits is 6144, while the sum is 31.

The square root of 228142831 is about 15104.3977370831. The cubic root of 228142831 is about 611.0390166546.

The spelling of 228142831 in words is "two hundred twenty-eight million, one hundred forty-two thousand, eight hundred thirty-one".