145552111 has 4 divisors (see below), whose sum is σ = 145611592. Its totient is φ = 145492632.

The previous prime is 145552109. The next prime is 145552129. The reversal of 145552111 is 111255541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111255541 = 4637 ⋅23993.

It is a cyclic number.

It is not a de Polignac number, because 145552111 - 2¹ = 145552109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145556111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25905 + ... + 31018.

It is an arithmetic number, because the mean of its divisors is an integer number (36402898).

Almost surely, 2^145552111 is an apocalyptic number.

145552111 is a deficient number, since it is larger than the sum of its proper divisors (59481).

145552111 is an equidigital number, since it uses as much as digits as its factorization.

145552111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59480.

The product of its digits is 1000, while the sum is 25.

The square root of 145552111 is about 12064.4979588875. The cubic root of 145552111 is about 526.0247389657.

The spelling of 145552111 in words is "one hundred forty-five million, five hundred fifty-two thousand, one hundred eleven".