155500445 has 8 divisors (see below), whose sum is σ = 197577144. Its totient is φ = 117082624.

The previous prime is 155500441. The next prime is 155500453. The reversal of 155500445 is 544005551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65383396 + 90117049 = 8086^2 + 9493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155500445 - 2² = 155500441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155500441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914624 + ... + 914793.

It is an arithmetic number, because the mean of its divisors is an integer number (24697143).

Almost surely, 2^155500445 is an apocalyptic number.

It is an amenable number.

155500445 is a deficient number, since it is larger than the sum of its proper divisors (42076699).

155500445 is a wasteful number, since it uses less digits than its factorization.

155500445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829439.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 155500445 is about 12469.9817562016. The cubic root of 155500445 is about 537.7460290665.

Adding to 155500445 its reverse (544005551), we get a palindrome (699505996).

The spelling of 155500445 in words is "one hundred fifty-five million, five hundred thousand, four hundred forty-five".