146531831 has 8 divisors (see below), whose sum is σ = 150176400. Its totient is φ = 142898112.

The previous prime is 146531813. The next prime is 146531839. The reversal of 146531831 is 138135641.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146531831 is a prime.

It is a super-2 number, since 2×146531831² = 42943154992425122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146531839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29195 + ... + 33843.

It is an arithmetic number, because the mean of its divisors is an integer number (18772050).

Almost surely, 2^146531831 is an apocalyptic number.

146531831 is a deficient number, since it is larger than the sum of its proper divisors (3644569).

146531831 is an equidigital number, since it uses as much as digits as its factorization.

146531831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425.

The product of its digits is 8640, while the sum is 32.

The square root of 146531831 is about 12105.0332919823. The cubic root of 146531831 is about 527.2023354495.

The spelling of 146531831 in words is "one hundred forty-six million, five hundred thirty-one thousand, eight hundred thirty-one".