1550212553 has 4 divisors (see below), whose sum is σ = 1552250388. Its totient is φ = 1548174720.

The previous prime is 1550212513. The next prime is 1550212577. The reversal of 1550212553 is 3552120551.

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 385219129 + 1164993424 = 19627^2 + 34132^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550212553 - 2¹⁶ = 1550147017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1550212513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1017776 + ... + 1019297.

It is an arithmetic number, because the mean of its divisors is an integer number (388062597).

Almost surely, 2^1550212553 is an apocalyptic number.

It is an amenable number.

1550212553 is a deficient number, since it is larger than the sum of its proper divisors (2037835).

1550212553 is an equidigital number, since it uses as much as digits as its factorization.

1550212553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037834.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1550212553 is about 39372.7387033211. The cubic root of 1550212553 is about 1157.3474251512.

The spelling of 1550212553 in words is "one billion, five hundred fifty million, two hundred twelve thousand, five hundred fifty-three".