145981213 has 16 divisors (see below), whose sum is σ = 169150464. Its totient is φ = 123404400.

The previous prime is 145981211. The next prime is 145981229. The reversal of 145981213 is 312189541.

It is not a de Polignac number, because 145981213 - 2¹ = 145981211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145981211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176106 + ... + 176932.

It is an arithmetic number, because the mean of its divisors is an integer number (10571904).

Almost surely, 2^145981213 is an apocalyptic number.

It is an amenable number.

145981213 is a deficient number, since it is larger than the sum of its proper divisors (23169251).

145981213 is a wasteful number, since it uses less digits than its factorization.

145981213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its digits is 8640, while the sum is 34.

The square root of 145981213 is about 12082.2685369925. The cubic root of 145981213 is about 526.5411561108.

The spelling of 145981213 in words is "one hundred forty-five million, nine hundred eighty-one thousand, two hundred thirteen".