231277643 has 2 divisors, whose sum is σ = 231277644. Its totient is φ = 231277642.

The previous prime is 231277619. The next prime is 231277649. The reversal of 231277643 is 346772132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231277643 - 2¹⁴ = 231261259 is a prime.

It is a super-4 number, since 4×231277643⁴ (a number of 35 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (231277649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115638821 + 115638822.

It is an arithmetic number, because the mean of its divisors is an integer number (115638822).

Almost surely, 2^231277643 is an apocalyptic number.

231277643 is a deficient number, since it is larger than the sum of its proper divisors (1).

231277643 is an equidigital number, since it uses as much as digits as its factorization.

231277643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 35.

The square root of 231277643 is about 15207.8151948266. The cubic root of 231277643 is about 613.8249694731.

The spelling of 231277643 in words is "two hundred thirty-one million, two hundred seventy-seven thousand, six hundred forty-three".