145549519 has 16 divisors (see below), whose sum is σ = 156988800. Its totient is φ = 134525664.

The previous prime is 145549499. The next prime is 145549531. The reversal of 145549519 is 915945541.

It is not a de Polignac number, because 145549519 - 2⁵ = 145549487 is a prime.

It is a super-2 number, since 2×145549519² = 42369324962262722, which 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 (145549319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175584 + ... + 176410.

It is an arithmetic number, because the mean of its divisors is an integer number (9811800).

Almost surely, 2^145549519 is an apocalyptic number.

145549519 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145549519 is a deficient number, since it is larger than the sum of its proper divisors (11439281).

145549519 is a wasteful number, since it uses less digits than its factorization.

145549519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062.

The product of its digits is 162000, while the sum is 43.

The square root of 145549519 is about 12064.3905357875. The cubic root of 145549519 is about 526.0216164547.

The spelling of 145549519 in words is "one hundred forty-five million, five hundred forty-nine thousand, five hundred nineteen".