1550136013 has 4 divisors (see below), whose sum is σ = 1552919580. Its totient is φ = 1547352448.

The previous prime is 1550136001. The next prime is 1550136017. The reversal of 1550136013 is 3106310551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288252484 + 1261883529 = 16978^2 + 35523^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550136013 - 2¹⁷ = 1550004941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550136017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390948 + ... + 1392061.

It is an arithmetic number, because the mean of its divisors is an integer number (388229895).

Almost surely, 2^1550136013 is an apocalyptic number.

It is an amenable number.

1550136013 is a deficient number, since it is larger than the sum of its proper divisors (2783567).

1550136013 is an equidigital number, since it uses as much as digits as its factorization.

1550136013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783566.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 1550136013 is about 39371.7666989938. The cubic root of 1550136013 is about 1157.3283772622.

Adding to 1550136013 its reverse (3106310551), we get a palindrome (4656446564).

The spelling of 1550136013 in words is "one billion, five hundred fifty million, one hundred thirty-six thousand, thirteen".