201550005 has 32 divisors (see below), whose sum is σ = 377174400. Its totient is φ = 101834496.

The previous prime is 201550001. The next prime is 201550009. The reversal of 201550005 is 500055102.

It is an interprime number because it is at equal distance from previous prime (201550001) and next prime (201550009).

It is not a de Polignac number, because 201550005 - 2² = 201550001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201550005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201550001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36724 + ... + 41853.

It is an arithmetic number, because the mean of its divisors is an integer number (11786700).

Almost surely, 2^201550005 is an apocalyptic number.

It is an amenable number.

201550005 is a deficient number, since it is larger than the sum of its proper divisors (175624395).

201550005 is a wasteful number, since it uses less digits than its factorization.

201550005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78610 (or 78604 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 201550005 is about 14196.8308083177. The cubic root of 201550005 is about 586.3104089547.

It can be divided in two parts, 20 and 1550005, that added together give a square (1550025 = 1245²).

The spelling of 201550005 in words is "two hundred one million, five hundred fifty thousand, five".