145273330 has 32 divisors (see below), whose sum is σ = 281432880. Its totient is φ = 53790720.

The previous prime is 145273319. The next prime is 145273333. The reversal of 145273330 is 33372541.

It can be written as a sum of positive squares in 8 ways, for example, as 62299449 + 82973881 = 7893^2 + 9109^2 .

It is a super-2 number, since 2×145273330² = 42208680818577800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145273333) 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, 3366 + ... + 17374.

Almost surely, 2^145273330 is an apocalyptic number.

145273330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145273330 is a deficient number, since it is larger than the sum of its proper divisors (136159550).

145273330 is a wasteful number, since it uses less digits than its factorization.

145273330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14094.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 145273330 is about 12052.9386458241. The cubic root of 145273330 is about 525.6886865221.

The spelling of 145273330 in words is "one hundred forty-five million, two hundred seventy-three thousand, three hundred thirty".