1550035221 has 16 divisors (see below), whose sum is σ = 2391859200. Its totient is φ = 874521648.

The previous prime is 1550035213. The next prime is 1550035259. The reversal of 1550035221 is 1225300551.

It is a happy number.

It is not a de Polignac number, because 1550035221 - 2³ = 1550035213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1550035191 and 1550035200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550035211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465501 + ... + 468818.

It is an arithmetic number, because the mean of its divisors is an integer number (149491200).

Almost surely, 2^1550035221 is an apocalyptic number.

It is an amenable number.

1550035221 is a deficient number, since it is larger than the sum of its proper divisors (841823979).

1550035221 is an equidigital number, since it uses as much as digits as its factorization.

1550035221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934408.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1550035221 is about 39370.4866746653. The cubic root of 1550035221 is about 1157.3032930182.

Adding to 1550035221 its reverse (1225300551), we get a palindrome (2775335772).

It can be divided in two parts, 15500 and 35221, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 1550035221 in words is "one billion, five hundred fifty million, thirty-five thousand, two hundred twenty-one".