146223231 has 16 divisors (see below), whose sum is σ = 243072768. Its totient is φ = 75960000.

The previous prime is 146223227. The next prime is 146223247. The reversal of 146223231 is 132322641.

It is not a de Polignac number, because 146223231 - 2² = 146223227 is a prime.

It is a super-2 number, since 2×146223231² = 42762466568158722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146223431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316270 + ... + 316731.

It is an arithmetic number, because the mean of its divisors is an integer number (15192048).

Almost surely, 2^146223231 is an apocalyptic number.

146223231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

146223231 is a deficient number, since it is larger than the sum of its proper divisors (96849537).

146223231 is a wasteful number, since it uses less digits than its factorization.

146223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633022.

The product of its digits is 1728, while the sum is 24.

The square root of 146223231 is about 12092.2798098622. The cubic root of 146223231 is about 526.8319745376.

Adding to 146223231 its reverse (132322641), we get a palindrome (278545872).

The spelling of 146223231 in words is "one hundred forty-six million, two hundred twenty-three thousand, two hundred thirty-one".