1550138205 has 32 divisors (see below), whose sum is σ = 3092226048. Its totient is φ = 644212800.

The previous prime is 1550138171. The next prime is 1550138231. The reversal of 1550138205 is 5028310551.

It is not a de Polignac number, because 1550138205 - 2⁶ = 1550138141 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669901 + ... + 672210.

It is an arithmetic number, because the mean of its divisors is an integer number (96632064).

Almost surely, 2^1550138205 is an apocalyptic number.

1550138205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1550138205 is a deficient number, since it is larger than the sum of its proper divisors (1542087843).

1550138205 is a wasteful number, since it uses less digits than its factorization.

1550138205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342137.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1550138205 is about 39371.7945361905. The cubic root of 1550138205 is about 1157.3289227762.

Adding to 1550138205 its reverse (5028310551), we get a palindrome (6578448756).

The spelling of 1550138205 in words is "one billion, five hundred fifty million, one hundred thirty-eight thousand, two hundred five".