145251615 has 16 divisors (see below), whose sum is σ = 232562016. Its totient is φ = 77414400.

The previous prime is 145251539. The next prime is 145251629. The reversal of 145251615 is 516152541.

145251615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145251615 - 2⁷ = 145251487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30175 + ... + 34655.

It is an arithmetic number, because the mean of its divisors is an integer number (14535126).

Almost surely, 2^145251615 is an apocalyptic number.

145251615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145251615 is a deficient number, since it is larger than the sum of its proper divisors (87310401).

145251615 is a wasteful number, since it uses less digits than its factorization.

145251615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6650.

The product of its digits is 6000, while the sum is 30.

The square root of 145251615 is about 12052.0377944977. The cubic root of 145251615 is about 525.6624924537.

The spelling of 145251615 in words is "one hundred forty-five million, two hundred fifty-one thousand, six hundred fifteen".