145515211 has 2 divisors, whose sum is σ = 145515212. Its totient is φ = 145515210.

The previous prime is 145515179. The next prime is 145515221. The reversal of 145515211 is 112515541.

It is a strong prime.

It is an emirp because it is prime and its reverse (112515541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145515211 - 2⁵ = 145515179 is a prime.

It is not a weakly prime, because it can be changed into another prime (145515221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72757605 + 72757606.

It is an arithmetic number, because the mean of its divisors is an integer number (72757606).

Almost surely, 2^145515211 is an apocalyptic number.

145515211 is a deficient number, since it is larger than the sum of its proper divisors (1).

145515211 is an equidigital number, since it uses as much as digits as its factorization.

145515211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000, while the sum is 25.

The square root of 145515211 is about 12062.9685815723. The cubic root of 145515211 is about 525.9802830586.

The spelling of 145515211 in words is "one hundred forty-five million, five hundred fifteen thousand, two hundred eleven".