145330581 has 16 divisors (see below), whose sum is σ = 212663808. Its totient is φ = 87548400.

The previous prime is 145330579. The next prime is 145330613. The reversal of 145330581 is 185033541.

It is not a de Polignac number, because 145330581 - 2¹ = 145330579 is a prime.

It is a super-2 number, since 2×145330581² = 42241955547595122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145330531) 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, 7675 + ... + 18696.

It is an arithmetic number, because the mean of its divisors is an integer number (13291488).

Almost surely, 2^145330581 is an apocalyptic number.

145330581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145330581 is a deficient number, since it is larger than the sum of its proper divisors (67333227).

145330581 is a wasteful number, since it uses less digits than its factorization.

145330581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26552.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 145330581 is about 12055.3133928571. The cubic root of 145330581 is about 525.7577339523.

The spelling of 145330581 in words is "one hundred forty-five million, three hundred thirty thousand, five hundred eighty-one".