155445201 has 12 divisors (see below), whose sum is σ = 234294528. Its totient is φ = 99124344.

The previous prime is 155445193. The next prime is 155445217. The reversal of 155445201 is 102544551.

155445201 is a `hidden beast` number, since 15 + 5 + 445 + 201 = 666.

It is not a de Polignac number, because 155445201 - 2³ = 155445193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155445221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375265 + ... + 375678.

It is an arithmetic number, because the mean of its divisors is an integer number (19524544).

Almost surely, 2^155445201 is an apocalyptic number.

It is an amenable number.

155445201 is a deficient number, since it is larger than the sum of its proper divisors (78849327).

155445201 is a wasteful number, since it uses less digits than its factorization.

155445201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750972 (or 750969 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 155445201 is about 12467.7664800076. The cubic root of 155445201 is about 537.6823405879.

Adding to 155445201 its reverse (102544551), we get a palindrome (257989752).

The spelling of 155445201 in words is "one hundred fifty-five million, four hundred forty-five thousand, two hundred one".