201501550 has 48 divisors (see below), whose sum is σ = 392546304. Its totient is φ = 76860000.

The previous prime is 201501539. The next prime is 201501563. The reversal of 201501550 is 55105102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109135 + ... + 110965.

It is an arithmetic number, because the mean of its divisors is an integer number (8178048).

Almost surely, 2^201501550 is an apocalyptic number.

201501550 is a deficient number, since it is larger than the sum of its proper divisors (191044754).

201501550 is a wasteful number, since it uses less digits than its factorization.

201501550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945 (or 1940 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 201501550 is about 14195.1241628948. The cubic root of 201501550 is about 586.2634198749.

Adding to 201501550 its reverse (55105102), we get a palindrome (256606652).

The spelling of 201501550 in words is "two hundred one million, five hundred one thousand, five hundred fifty".