145981215 has 24 divisors (see below), whose sum is σ = 261761760. Its totient is φ = 75171264.

The previous prime is 145981211. The next prime is 145981229. The reversal of 145981215 is 512189541.

It is not a de Polignac number, because 145981215 - 2² = 145981211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145981215.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54627 + ... + 57236.

It is an arithmetic number, because the mean of its divisors is an integer number (10906740).

Almost surely, 2^145981215 is an apocalyptic number.

145981215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145981215 is a deficient number, since it is larger than the sum of its proper divisors (115780545).

145981215 is a wasteful number, since it uses less digits than its factorization.

145981215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111903 (or 111900 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 145981215 is about 12082.2686197585. The cubic root of 145981215 is about 526.5411585154.

The spelling of 145981215 in words is "one hundred forty-five million, nine hundred eighty-one thousand, two hundred fifteen".