145305199 has 4 divisors (see below), whose sum is σ = 156482536. Its totient is φ = 134127864.

The previous prime is 145305163. The next prime is 145305211. The reversal of 145305199 is 991503541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 145305199 - 2²⁷ = 11087471 is a prime.

It is a super-2 number, since 2×145305199² = 42227201712859202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145305119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5588649 + ... + 5588674.

It is an arithmetic number, because the mean of its divisors is an integer number (39120634).

Almost surely, 2^145305199 is an apocalyptic number.

145305199 is a deficient number, since it is larger than the sum of its proper divisors (11177337).

145305199 is a wasteful number, since it uses less digits than its factorization.

145305199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177336.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 145305199 is about 12054.2606160643. The cubic root of 145305199 is about 525.7271242905.

The spelling of 145305199 in words is "one hundred forty-five million, three hundred five thousand, one hundred ninety-nine".