228837431 has 2 divisors, whose sum is σ = 228837432. Its totient is φ = 228837430.

The previous prime is 228837421. The next prime is 228837439. The reversal of 228837431 is 134738822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228837431 is a prime.

It is a super-2 number, since 2×228837431² = 104733139653359522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228837439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114418715 + 114418716.

It is an arithmetic number, because the mean of its divisors is an integer number (114418716).

Almost surely, 2^228837431 is an apocalyptic number.

228837431 is a deficient number, since it is larger than the sum of its proper divisors (1).

228837431 is an equidigital number, since it uses as much as digits as its factorization.

228837431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 228837431 is about 15127.3735658243. The cubic root of 228837431 is about 611.6585082409.

The spelling of 228837431 in words is "two hundred twenty-eight million, eight hundred thirty-seven thousand, four hundred thirty-one".