146331231 has 8 divisors (see below), whose sum is σ = 196401024. Its totient is φ = 96907800.

The previous prime is 146331169. The next prime is 146331233. The reversal of 146331231 is 132133641.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 146331231 - 2¹³ = 146323039 is a prime.

It is a super-2 number, since 2×146331231² = 42825658331950722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146331233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161061 + ... + 161966.

It is an arithmetic number, because the mean of its divisors is an integer number (24550128).

Almost surely, 2^146331231 is an apocalyptic number.

146331231 is a deficient number, since it is larger than the sum of its proper divisors (50069793).

146331231 is a wasteful number, since it uses less digits than its factorization.

146331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323181.

The product of its digits is 1296, while the sum is 24.

The square root of 146331231 is about 12096.7446447381. The cubic root of 146331231 is about 526.9616480749.

Adding to 146331231 its reverse (132133641), we get a palindrome (278464872).

The spelling of 146331231 in words is "one hundred forty-six million, three hundred thirty-one thousand, two hundred thirty-one".