145955518 has 4 divisors (see below), whose sum is σ = 218933280. Its totient is φ = 72977758.

The previous prime is 145955501. The next prime is 145955519. The reversal of 145955518 is 815559541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 815559541 = 173 ⋅4714217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145955519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36488878 + ... + 36488881.

It is an arithmetic number, because the mean of its divisors is an integer number (54733320).

Almost surely, 2^145955518 is an apocalyptic number.

145955518 is a deficient number, since it is larger than the sum of its proper divisors (72977762).

145955518 is an equidigital number, since it uses as much as digits as its factorization.

145955518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72977761.

The product of its digits is 180000, while the sum is 43.

The square root of 145955518 is about 12081.2051551159. The cubic root of 145955518 is about 526.5102611104.

The spelling of 145955518 in words is "one hundred forty-five million, nine hundred fifty-five thousand, five hundred eighteen".