145515144 has 64 divisors (see below), whose sum is σ = 370578240. Its totient is φ = 47609600.

The previous prime is 145515137. The next prime is 145515169. The reversal of 145515144 is 441515541.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419179 + ... + 419525.

It is an arithmetic number, because the mean of its divisors is an integer number (5790285).

Almost surely, 2^145515144 is an apocalyptic number.

It is an amenable number.

145515144 is an abundant number, since it is smaller than the sum of its proper divisors (225063096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145515144 is a wasteful number, since it uses less digits than its factorization.

145515144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 626 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 145515144 is about 12062.9658044778. The cubic root of 145515144 is about 525.9802023323.

The spelling of 145515144 in words is "one hundred forty-five million, five hundred fifteen thousand, one hundred forty-four".