145222269 has 4 divisors (see below), whose sum is σ = 193629696. Its totient is φ = 96814844.

The previous prime is 145222249. The next prime is 145222291. The reversal of 145222269 is 962222541.

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 not a de Polignac number, because 145222269 - 2⁵ = 145222237 is a prime.

It is a super-2 number, since 2×145222269² = 42179014827016722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145222249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24203709 + ... + 24203714.

It is an arithmetic number, because the mean of its divisors is an integer number (48407424).

Almost surely, 2^145222269 is an apocalyptic number.

It is an amenable number.

145222269 is a deficient number, since it is larger than the sum of its proper divisors (48407427).

145222269 is an equidigital number, since it uses as much as digits as its factorization.

145222269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48407426.

The product of its digits is 17280, while the sum is 33.

The square root of 145222269 is about 12050.8202625381. The cubic root of 145222269 is about 525.6270892203.

The spelling of 145222269 in words is "one hundred forty-five million, two hundred twenty-two thousand, two hundred sixty-nine".