233156445481 has 2 divisors, whose sum is σ = 233156445482. Its totient is φ = 233156445480.

The previous prime is 233156445479. The next prime is 233156445523. The reversal of 233156445481 is 184544651332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232814935081 + 341510400 = 482509^2 + 18480^2 .

It is a cyclic number.

It is not a de Polignac number, because 233156445481 - 2¹ = 233156445479 is a prime.

It is a super-2 number, since 2×233156445481² (a number of 24 digits) contains 22 as substring.

Together with 233156445479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (233156445451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116578222740 + 116578222741.

It is an arithmetic number, because the mean of its divisors is an integer number (116578222741).

Almost surely, 2^233156445481 is an apocalyptic number.

It is an amenable number.

233156445481 is a deficient number, since it is larger than the sum of its proper divisors (1).

233156445481 is an equidigital number, since it uses as much as digits as its factorization.

233156445481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382400, while the sum is 46.

The spelling of 233156445481 in words is "two hundred thirty-three billion, one hundred fifty-six million, four hundred forty-five thousand, four hundred eighty-one".