145571331 has 16 divisors (see below), whose sum is σ = 204675840. Its totient is φ = 91775520.

The previous prime is 145571317. The next prime is 145571333. The reversal of 145571331 is 133175541.

It is not a de Polignac number, because 145571331 - 2⁵ = 145571299 is a prime.

It is a super-2 number, since 2×145571331² = 42382024818223122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145571333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35266 + ... + 39176.

It is an arithmetic number, because the mean of its divisors is an integer number (12792240).

Almost surely, 2^145571331 is an apocalyptic number.

145571331 is a deficient number, since it is larger than the sum of its proper divisors (59104509).

145571331 is a wasteful number, since it uses less digits than its factorization.

145571331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586.

The product of its digits is 6300, while the sum is 30.

The square root of 145571331 is about 12065.2944845951. The cubic root of 145571331 is about 526.0478916140.

The spelling of 145571331 in words is "one hundred forty-five million, five hundred seventy-one thousand, three hundred thirty-one".