23155313 has 2 divisors, whose sum is σ = 23155314.
Its totient is φ = 23155312.
The previous prime is 23155289. The next prime is 23155331. The reversal of 23155313 is 31355132.
Together with next prime (23155331) it forms an Ormiston pair, because they use the same digits, order apart.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 11751184 + 11404129 = 3428^2 + 3377^2
It is a cyclic number.
It is not a de Polignac number, because 23155313 - 220 = 22106737 is a prime.
It is not a weakly prime, because it can be changed into another prime (23155333) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577656 + 11577657.
It is an arithmetic number, because the mean of its divisors is an integer number (11577657).
Almost surely, 223155313 is an apocalyptic number.
It is an amenable number.
23155313 is a deficient number, since it is larger than the sum of its proper divisors (1).
23155313 is an equidigital number, since it uses as much as digits as its factorization.
23155313 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1350, while the sum is 23.
The square root of 23155313 is about 4811.9967788850.
The cubic root of 23155313 is about 285.0253922180.
The spelling of 23155313 in words is "twenty-three million, one hundred fifty-five thousand, three hundred thirteen".