145199955 has 16 divisors (see below), whose sum is σ = 240331680. Its totient is φ = 74769408.

The previous prime is 145199917. The next prime is 145199981. The reversal of 145199955 is 559991541.

145199955 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 145199955 - 2⁶ = 145199891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166462 + ... + 167331.

It is an arithmetic number, because the mean of its divisors is an integer number (15020730).

Almost surely, 2^145199955 is an apocalyptic number.

145199955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145199955 is a deficient number, since it is larger than the sum of its proper divisors (95131725).

145199955 is a wasteful number, since it uses less digits than its factorization.

145199955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333830.

The product of its digits is 364500, while the sum is 48.

The square root of 145199955 is about 12049.8943978775. The cubic root of 145199955 is about 525.6001662519.

The spelling of 145199955 in words is "one hundred forty-five million, one hundred ninety-nine thousand, nine hundred fifty-five".