145665211 has 2 divisors, whose sum is σ = 145665212. Its totient is φ = 145665210.

The previous prime is 145665181. The next prime is 145665227. The reversal of 145665211 is 112566541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145665211 - 2¹⁷ = 145534139 is a prime.

It is equal to p_8213935 and since 145665211 and 8213935 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145665281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72832605 + 72832606.

It is an arithmetic number, because the mean of its divisors is an integer number (72832606).

Almost surely, 2^145665211 is an apocalyptic number.

145665211 is a deficient number, since it is larger than the sum of its proper divisors (1).

145665211 is an equidigital number, since it uses as much as digits as its factorization.

145665211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 145665211 is about 12069.1843552081. The cubic root of 145665211 is about 526.1609513380.

The spelling of 145665211 in words is "one hundred forty-five million, six hundred sixty-five thousand, two hundred eleven".