23135381 has 2 divisors, whose sum is σ = 23135382. Its totient is φ = 23135380.

The previous prime is 23135377. The next prime is 23135383. The reversal of 23135381 is 18353132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 11122225 = 3466^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 23135381 - 2² = 23135377 is a prime.

It is a super-3 number, since 3×23135381³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 23135383, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23135381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23135383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11567690 + 11567691.

It is an arithmetic number, because the mean of its divisors is an integer number (11567691).

Almost surely, 2^23135381 is an apocalyptic number.

It is an amenable number.

23135381 is a deficient number, since it is larger than the sum of its proper divisors (1).

23135381 is an equidigital number, since it uses as much as digits as its factorization.

23135381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 23135381 is about 4809.9252592946. The cubic root of 23135381 is about 284.9435858381.

The spelling of 23135381 in words is "twenty-three million, one hundred thirty-five thousand, three hundred eighty-one".