145306229 has 2 divisors, whose sum is σ = 145306230. Its totient is φ = 145306228.

The previous prime is 145306177. The next prime is 145306277. The reversal of 145306229 is 922603541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96334225 + 48972004 = 9815^2 + 6998^2 .

It is a cyclic number.

It is not a de Polignac number, because 145306229 - 2¹² = 145302133 is a prime.

It is a super-2 number, since 2×145306229² = 42227800372400882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145306195 and 145306204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145302229) 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, 72653114 + 72653115.

It is an arithmetic number, because the mean of its divisors is an integer number (72653115).

Almost surely, 2^145306229 is an apocalyptic number.

It is an amenable number.

145306229 is a deficient number, since it is larger than the sum of its proper divisors (1).

145306229 is an equidigital number, since it uses as much as digits as its factorization.

145306229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 145306229 is about 12054.3033394718. The cubic root of 145306229 is about 525.7283664981.

The spelling of 145306229 in words is "one hundred forty-five million, three hundred six thousand, two hundred twenty-nine".