145228799 has 4 divisors (see below), whose sum is σ = 152872440. Its totient is φ = 137585160.

The previous prime is 145228793. The next prime is 145228801. The reversal of 145228799 is 997822541.

145228799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145228799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145228793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3821792 + ... + 3821829.

It is an arithmetic number, because the mean of its divisors is an integer number (38218110).

Almost surely, 2^145228799 is an apocalyptic number.

145228799 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145228799 is a deficient number, since it is larger than the sum of its proper divisors (7643641).

145228799 is an equidigital number, since it uses as much as digits as its factorization.

145228799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643640.

The product of its digits is 362880, while the sum is 47.

The square root of 145228799 is about 12051.0911954063. The cubic root of 145228799 is about 525.6349674735.

The spelling of 145228799 in words is "one hundred forty-five million, two hundred twenty-eight thousand, seven hundred ninety-nine".