233431481 has 2 divisors, whose sum is σ = 233431482. Its totient is φ = 233431480.

The previous prime is 233431447. The next prime is 233431559. The reversal of 233431481 is 184134332.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 72522256 = 12685^2 + 8516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233431481 is a prime.

It is a super-2 number, since 2×233431481² = 108980512643706722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (233430481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116715740 + 116715741.

It is an arithmetic number, because the mean of its divisors is an integer number (116715741).

Almost surely, 2^233431481 is an apocalyptic number.

It is an amenable number.

233431481 is a deficient number, since it is larger than the sum of its proper divisors (1).

233431481 is an equidigital number, since it uses as much as digits as its factorization.

233431481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 233431481 is about 15278.4646152681. The cubic root of 233431481 is about 615.7245572746.

The spelling of 233431481 in words is "two hundred thirty-three million, four hundred thirty-one thousand, four hundred eighty-one".