145597155 has 32 divisors (see below), whose sum is σ = 254700288. Its totient is φ = 70435200.

The previous prime is 145597141. The next prime is 145597157. The reversal of 145597155 is 551795541.

145597155 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 145597155 - 2⁹ = 145596643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145597157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113377 + ... + 114653.

It is an arithmetic number, because the mean of its divisors is an integer number (7959384).

Almost surely, 2^145597155 is an apocalyptic number.

145597155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145597155 is a deficient number, since it is larger than the sum of its proper divisors (109103133).

145597155 is a wasteful number, since it uses less digits than its factorization.

145597155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987.

The product of its digits is 157500, while the sum is 42.

The square root of 145597155 is about 12066.3646140832. The cubic root of 145597155 is about 526.0789963135.

The spelling of 145597155 in words is "one hundred forty-five million, five hundred ninety-seven thousand, one hundred fifty-five".