146731331 has 4 divisors (see below), whose sum is σ = 148077600. Its totient is φ = 145385064.

The previous prime is 146731309. The next prime is 146731367. The reversal of 146731331 is 133137641.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146731331 is a prime.

It is a super-2 number, since 2×146731331² = 43060166994063122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 146731294 and 146731303.

It is not an unprimeable number, because it can be changed into a prime (146731391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672971 + ... + 673188.

It is an arithmetic number, because the mean of its divisors is an integer number (37019400).

Almost surely, 2^146731331 is an apocalyptic number.

146731331 is a deficient number, since it is larger than the sum of its proper divisors (1346269).

146731331 is a wasteful number, since it uses less digits than its factorization.

146731331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346268.

The product of its digits is 4536, while the sum is 29.

The square root of 146731331 is about 12113.2708629833. The cubic root of 146731331 is about 527.4414852398.

Adding to 146731331 its reverse (133137641), we get a palindrome (279868972).

The spelling of 146731331 in words is "one hundred forty-six million, seven hundred thirty-one thousand, three hundred thirty-one".