145191111 has 24 divisors (see below), whose sum is σ = 218756736. Its totient is φ = 85456800.

The previous prime is 145191089. The next prime is 145191121. The reversal of 145191111 is 111191541.

145191111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145191111 - 2⁶ = 145191047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145191121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5436 + ... + 17886.

It is an arithmetic number, because the mean of its divisors is an integer number (9114864).

Almost surely, 2^145191111 is an apocalyptic number.

145191111 is a deficient number, since it is larger than the sum of its proper divisors (73565625).

145191111 is a wasteful number, since it uses less digits than its factorization.

145191111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12503 (or 12490 counting only the distinct ones).

The product of its digits is 180, while the sum is 24.

The square root of 145191111 is about 12049.5274181189. The cubic root of 145191111 is about 525.5894947558.

The spelling of 145191111 in words is "one hundred forty-five million, one hundred ninety-one thousand, one hundred eleven".