145205516213 has 6 divisors (see below), whose sum is σ = 147996938754. Its totient is φ = 142465786736.

The previous prime is 145205516189. The next prime is 145205516257. The reversal of 145205516213 is 312615502541.

It can be written as a sum of positive squares in 3 ways, for example, as 102743968369 + 42461547844 = 320537^2 + 206062^2 .

It is not a de Polignac number, because 145205516213 - 2³⁰ = 144131774389 is a prime.

It is a super-2 number, since 2×145205516213² (a number of 23 digits) 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 (145205516273) 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, 25843670 + ... + 25849287.

It is an arithmetic number, because the mean of its divisors is an integer number (24666156459).

Almost surely, 2^145205516213 is an apocalyptic number.

It is an amenable number.

145205516213 is a deficient number, since it is larger than the sum of its proper divisors (2791422541).

145205516213 is an frugal number, since it uses more digits than its factorization.

145205516213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51693063 (or 51693010 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 145205516213 in words is "one hundred forty-five billion, two hundred five million, five hundred sixteen thousand, two hundred thirteen".