145436181 has 16 divisors (see below), whose sum is σ = 212556288. Its totient is φ = 87721200.

The previous prime is 145436167. The next prime is 145436183. The reversal of 145436181 is 181634541.

It is not a de Polignac number, because 145436181 - 2⁵ = 145436149 is a prime.

It is a super-2 number, since 2×145436181² = 42303365487729522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145436183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3481 + ... + 17406.

It is an arithmetic number, because the mean of its divisors is an integer number (13284768).

Almost surely, 2^145436181 is an apocalyptic number.

145436181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145436181 is the 6963-rd octagonal number.

It is an amenable number.

145436181 is a deficient number, since it is larger than the sum of its proper divisors (67120107).

145436181 is a wasteful number, since it uses less digits than its factorization.

145436181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21112.

The product of its digits is 11520, while the sum is 33.

The square root of 145436181 is about 12059.6924090128. The cubic root of 145436181 is about 525.8850450211.

The spelling of 145436181 in words is "one hundred forty-five million, four hundred thirty-six thousand, one hundred eighty-one".