145527881 has 4 divisors (see below), whose sum is σ = 145563264. Its totient is φ = 145492500.

The previous prime is 145527869. The next prime is 145527917. The reversal of 145527881 is 188725541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145527881 is a prime.

It is a super-2 number, since 2×145527881² = 42356728296700322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145547881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10565 + ... + 20066.

It is an arithmetic number, because the mean of its divisors is an integer number (36390816).

Almost surely, 2^145527881 is an apocalyptic number.

It is an amenable number.

145527881 is a deficient number, since it is larger than the sum of its proper divisors (35383).

145527881 is an equidigital number, since it uses as much as digits as its factorization.

145527881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35382.

The product of its digits is 89600, while the sum is 41.

The square root of 145527881 is about 12063.4937310880. The cubic root of 145527881 is about 525.9955483053.

The spelling of 145527881 in words is "one hundred forty-five million, five hundred twenty-seven thousand, eight hundred eighty-one".