1552550509 has 2 divisors, whose sum is σ = 1552550510. Its totient is φ = 1552550508.

The previous prime is 1552550507. The next prime is 1552550557. The reversal of 1552550509 is 9050552551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1362717225 + 189833284 = 36915^2 + 13778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1552550509 - 2¹ = 1552550507 is a prime.

Together with 1552550507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1552550501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776275254 + 776275255.

It is an arithmetic number, because the mean of its divisors is an integer number (776275255).

Almost surely, 2^1552550509 is an apocalyptic number.

It is an amenable number.

1552550509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552550509 is an equidigital number, since it uses as much as digits as its factorization.

1552550509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56250, while the sum is 37.

The square root of 1552550509 is about 39402.4175527340. The cubic root of 1552550509 is about 1157.9289514767.

The spelling of 1552550509 in words is "one billion, five hundred fifty-two million, five hundred fifty thousand, five hundred nine".