145521199 has 16 divisors (see below), whose sum is σ = 152215200. Its totient is φ = 139025536.

The previous prime is 145521191. The next prime is 145521221. The reversal of 145521199 is 991125541.

It is a cyclic number.

It is not a de Polignac number, because 145521199 - 2³ = 145521191 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 (145521191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540837 + ... + 541105.

It is an arithmetic number, because the mean of its divisors is an integer number (9513450).

Almost surely, 2^145521199 is an apocalyptic number.

145521199 is a deficient number, since it is larger than the sum of its proper divisors (6694001).

145521199 is a wasteful number, since it uses less digits than its factorization.

145521199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554.

The product of its digits is 16200, while the sum is 37.

The square root of 145521199 is about 12063.2167766313. The cubic root of 145521199 is about 525.9874977150.

It can be divided in two parts, 14552 and 1199, that added together give a palindrome (15751).

The spelling of 145521199 in words is "one hundred forty-five million, five hundred twenty-one thousand, one hundred ninety-nine".