145207230517 has 4 divisors (see below), whose sum is σ = 145220859040. Its totient is φ = 145193601996.

The previous prime is 145207230473. The next prime is 145207230587. The reversal of 145207230517 is 715032702541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145207230517 - 2¹¹ = 145207228469 is a prime.

It is a super-3 number, since 3×145207230517³ (a number of 34 digits) contains 333 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 (145207230587) 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, 6798267 + ... + 6819592.

It is an arithmetic number, because the mean of its divisors is an integer number (36305214760).

Almost surely, 2^145207230517 is an apocalyptic number.

It is an amenable number.

145207230517 is a deficient number, since it is larger than the sum of its proper divisors (13628523).

145207230517 is a wasteful number, since it uses less digits than its factorization.

145207230517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13628522.

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 145207230517 in words is "one hundred forty-five billion, two hundred seven million, two hundred thirty thousand, five hundred seventeen".