1550205105 has 16 divisors (see below), whose sum is σ = 2504411520. Its totient is φ = 818748288.

The previous prime is 1550205101. The next prime is 1550205113. The reversal of 1550205105 is 5015020551.

It is not a de Polignac number, because 1550205105 - 2² = 1550205101 is a prime.

It is a super-2 number, since 2×1550205105² = 4806271735136122050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1550205101) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 500140 + ... + 503229.

It is an arithmetic number, because the mean of its divisors is an integer number (156525720).

Almost surely, 2^1550205105 is an apocalyptic number.

1550205105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1550205105 is a deficient number, since it is larger than the sum of its proper divisors (954206415).

1550205105 is a wasteful number, since it uses less digits than its factorization.

1550205105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003480.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 1550205105 is about 39372.6441199978. The cubic root of 1550205105 is about 1157.3455716554.

Adding to 1550205105 its reverse (5015020551), we get a palindrome (6565225656).

The spelling of 1550205105 in words is "one billion, five hundred fifty million, two hundred five thousand, one hundred five".