145423211 has 4 divisors (see below), whose sum is σ = 145447512. Its totient is φ = 145398912.

The previous prime is 145423199. The next prime is 145423249. The reversal of 145423211 is 112324541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 145423211 - 2⁶ = 145423147 is a prime.

It is a super-2 number, since 2×145423211² = 42295820595101042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145423111) 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, 3851 + ... + 17483.

It is an arithmetic number, because the mean of its divisors is an integer number (36361878).

Almost surely, 2^145423211 is an apocalyptic number.

145423211 is a deficient number, since it is larger than the sum of its proper divisors (24301).

145423211 is a wasteful number, since it uses less digits than its factorization.

145423211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24300.

The product of its digits is 960, while the sum is 23.

The square root of 145423211 is about 12059.1546552816. The cubic root of 145423211 is about 525.8694117453.

Adding to 145423211 its reverse (112324541), we get a palindrome (257747752).

The spelling of 145423211 in words is "one hundred forty-five million, four hundred twenty-three thousand, two hundred eleven".