145226223 has 32 divisors (see below), whose sum is σ = 233392320. Its totient is φ = 88888320.

The previous prime is 145226219. The next prime is 145226231. The reversal of 145226223 is 322622541.

It is a happy number.

145226223 is a `hidden beast` number, since 14 + 5 + 22 + 622 + 3 = 666.

It is not a de Polignac number, because 145226223 - 2² = 145226219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145226243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14961 + ... + 22677.

It is an arithmetic number, because the mean of its divisors is an integer number (7293510).

Almost surely, 2^145226223 is an apocalyptic number.

145226223 is a deficient number, since it is larger than the sum of its proper divisors (88166097).

145226223 is a wasteful number, since it uses less digits than its factorization.

145226223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784 (or 7778 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 145226223 is about 12050.9843166440. The cubic root of 145226223 is about 525.6318596334.

Adding to 145226223 its reverse (322622541), we get a palindrome (467848764).

The spelling of 145226223 in words is "one hundred forty-five million, two hundred twenty-six thousand, two hundred twenty-three".