438274231 has 2 divisors, whose sum is σ = 438274232. Its totient is φ = 438274230.

The previous prime is 438274183. The next prime is 438274253. The reversal of 438274231 is 132472834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438274231 is a prime.

It is a super-2 number, since 2×438274231² = 384168603117282722, which contains 22 as substring.

It is equal to p_23263855 and since 438274231 and 23263855 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438274271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219137115 + 219137116.

It is an arithmetic number, because the mean of its divisors is an integer number (219137116).

Almost surely, 2^438274231 is an apocalyptic number.

438274231 is a deficient number, since it is larger than the sum of its proper divisors (1).

438274231 is an equidigital number, since it uses as much as digits as its factorization.

438274231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 34.

The square root of 438274231 is about 20935.0001433007. Note that the first 3 decimals coincide. The cubic root of 438274231 is about 759.5947926515.

The spelling of 438274231 in words is "four hundred thirty-eight million, two hundred seventy-four thousand, two hundred thirty-one".