145031831 has 8 divisors (see below), whose sum is σ = 168468384. Its totient is φ = 122274720.

The previous prime is 145031827. The next prime is 145031833. The reversal of 145031831 is 138130541.

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

It is a cyclic number.

It is not a de Polignac number, because 145031831 - 2² = 145031827 is a prime.

It is a super-2 number, since 2×145031831² = 42068464006425122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145031831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145031833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169400 + ... + 170253.

It is an arithmetic number, because the mean of its divisors is an integer number (21058548).

Almost surely, 2^145031831 is an apocalyptic number.

145031831 is a deficient number, since it is larger than the sum of its proper divisors (23436553).

145031831 is an equidigital number, since it uses as much as digits as its factorization.

145031831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339721.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 145031831 is about 12042.9162165980. The cubic root of 145031831 is about 525.3972274149.

The spelling of 145031831 in words is "one hundred forty-five million, thirty-one thousand, eight hundred thirty-one".