145015513 has 4 divisors (see below), whose sum is σ = 145058688. Its totient is φ = 144972340.

The previous prime is 145015511. The next prime is 145015517. The reversal of 145015513 is 315510541.

It is a happy number.

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 145015513 - 2¹ = 145015511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145015511) 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, 16081 + ... + 23422.

It is an arithmetic number, because the mean of its divisors is an integer number (36264672).

Almost surely, 2^145015513 is an apocalyptic number.

It is an amenable number.

145015513 is a deficient number, since it is larger than the sum of its proper divisors (43175).

145015513 is an equidigital number, since it uses as much as digits as its factorization.

145015513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43174.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 145015513 is about 12042.2387038291. The cubic root of 145015513 is about 525.3775219625.

The spelling of 145015513 in words is "one hundred forty-five million, fifteen thousand, five hundred thirteen".