145520444 has 6 divisors (see below), whose sum is σ = 254660784. Its totient is φ = 72760220.

The previous prime is 145520443. The next prime is 145520447. The reversal of 145520444 is 444025541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145520443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18190052 + ... + 18190059.

It is an arithmetic number, because the mean of its divisors is an integer number (42443464).

Almost surely, 2^145520444 is an apocalyptic number.

It is an amenable number.

145520444 is a deficient number, since it is larger than the sum of its proper divisors (109140340).

145520444 is a wasteful number, since it uses less digits than its factorization.

145520444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36380115 (or 36380113 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 145520444 is about 12063.1854831135. The cubic root of 145520444 is about 525.9865880623.

Adding to 145520444 its reverse (444025541), we get a palindrome (589545985).

The spelling of 145520444 in words is "one hundred forty-five million, five hundred twenty thousand, four hundred forty-four".