1550173013 has 2 divisors, whose sum is σ = 1550173014. Its totient is φ = 1550173012.

The previous prime is 1550172983. The next prime is 1550173117. The reversal of 1550173013 is 3103710551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1506837124 + 43335889 = 38818^2 + 6583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550173013 - 2²⁴ = 1533395797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550173213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775086506 + 775086507.

It is an arithmetic number, because the mean of its divisors is an integer number (775086507).

Almost surely, 2^1550173013 is an apocalyptic number.

It is an amenable number.

1550173013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550173013 is an equidigital number, since it uses as much as digits as its factorization.

1550173013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 26.

The square root of 1550173013 is about 39372.2365760443. The cubic root of 1550173013 is about 1157.3375852304.

Adding to 1550173013 its reverse (3103710551), we get a palindrome (4653883564).

The spelling of 1550173013 in words is "one billion, five hundred fifty million, one hundred seventy-three thousand, thirteen".