145227717 has 6 divisors (see below), whose sum is σ = 209773382. Its totient is φ = 96818472.

The previous prime is 145227689. The next prime is 145227743. The reversal of 145227717 is 717722541.

It can be written as a sum of positive squares in only one way, i.e., 144144036 + 1083681 = 12006^2 + 1041^2 .

It is not a de Polignac number, because 145227717 - 2⁸ = 145227461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145227757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8068198 + ... + 8068215.

Almost surely, 2^145227717 is an apocalyptic number.

It is an amenable number.

145227717 is a deficient number, since it is larger than the sum of its proper divisors (64545665).

145227717 is a wasteful number, since it uses less digits than its factorization.

145227717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16136419 (or 16136416 counting only the distinct ones).

The product of its digits is 27440, while the sum is 36.

The square root of 145227717 is about 12051.0463031224. The cubic root of 145227717 is about 525.6336620886.

The spelling of 145227717 in words is "one hundred forty-five million, two hundred twenty-seven thousand, seven hundred seventeen".