145220155015 has 32 divisors (see below), whose sum is σ = 189857183040. Its totient is φ = 105990196224.

The previous prime is 145220155013. The next prime is 145220155027. The reversal of 145220155015 is 510551022541.

It is a cyclic number.

It is not a de Polignac number, because 145220155015 - 2¹ = 145220155013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145220155013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21268032 + ... + 21274858.

It is an arithmetic number, because the mean of its divisors is an integer number (5933036970).

Almost surely, 2^145220155015 is an apocalyptic number.

145220155015 is a deficient number, since it is larger than the sum of its proper divisors (44637028025).

145220155015 is a wasteful number, since it uses less digits than its factorization.

145220155015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 145220155015 its reverse (510551022541), we get a palindrome (655771177556).

The spelling of 145220155015 in words is "one hundred forty-five billion, two hundred twenty million, one hundred fifty-five thousand, fifteen".