145256331 has 16 divisors (see below), whose sum is σ = 218568960. Its totient is φ = 84997920.

The previous prime is 145256329. The next prime is 145256333. The reversal of 145256331 is 133652541.

145256331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145256329) and next prime (145256333).

It is not a de Polignac number, because 145256331 - 2¹ = 145256329 is a prime.

It is a super-2 number, since 2×145256331² = 42198803391163122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145256333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74935 + ... + 76848.

It is an arithmetic number, because the mean of its divisors is an integer number (13660560).

Almost surely, 2^145256331 is an apocalyptic number.

145256331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145256331 is a deficient number, since it is larger than the sum of its proper divisors (73312629).

145256331 is a wasteful number, since it uses less digits than its factorization.

145256331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151826.

The product of its digits is 10800, while the sum is 30.

The square root of 145256331 is about 12052.2334444700. The cubic root of 145256331 is about 525.6681814265.

The spelling of 145256331 in words is "one hundred forty-five million, two hundred fifty-six thousand, three hundred thirty-one".