1550205215 has 16 divisors (see below), whose sum is σ = 2041145568. Its totient is φ = 1123165056.

The previous prime is 1550205157. The next prime is 1550205227. The reversal of 1550205215 is 5125020551.

It is a de Polignac number, because none of the positive numbers 2^k-1550205215 is a prime.

It is a super-2 number, since 2×1550205215² = 4806272417226392450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221549 + ... + 228438.

It is an arithmetic number, because the mean of its divisors is an integer number (127571598).

Almost surely, 2^1550205215 is an apocalyptic number.

1550205215 is a deficient number, since it is larger than the sum of its proper divisors (490940353).

1550205215 is a wasteful number, since it uses less digits than its factorization.

1550205215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450058.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1550205215 is about 39372.6455169068. The cubic root of 1550205215 is about 1157.3455990298.

Adding to 1550205215 its reverse (5125020551), we get a palindrome (6675225766).

The spelling of 1550205215 in words is "one billion, five hundred fifty million, two hundred five thousand, two hundred fifteen".