145812223 has 2 divisors, whose sum is σ = 145812224. Its totient is φ = 145812222.

The previous prime is 145812211. The next prime is 145812239. The reversal of 145812223 is 322218541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145812223 - 2²¹ = 143715071 is a prime.

It is a super-2 number, since 2×145812223² = 42522408752403458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145812191 and 145812200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145812253) 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 as a sum of consecutive naturals, namely, 72906111 + 72906112.

It is an arithmetic number, because the mean of its divisors is an integer number (72906112).

Almost surely, 2^145812223 is an apocalyptic number.

145812223 is a deficient number, since it is larger than the sum of its proper divisors (1).

145812223 is an equidigital number, since it uses as much as digits as its factorization.

145812223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 28.

The square root of 145812223 is about 12075.2732060190. The cubic root of 145812223 is about 526.3379003969.

The spelling of 145812223 in words is "one hundred forty-five million, eight hundred twelve thousand, two hundred twenty-three".