1550566001 has 4 divisors (see below), whose sum is σ = 1550762352. Its totient is φ = 1550369652.

The previous prime is 1550565983. The next prime is 1550566019. The reversal of 1550566001 is 1006650551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1006650551 = 5581 ⋅180371.

It is an interprime number because it is at equal distance from previous prime (1550565983) and next prime (1550566019).

It is a cyclic number.

It is not a de Polignac number, because 1550566001 - 2¹⁸ = 1550303857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1550566021) 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, 85811 + ... + 102296.

It is an arithmetic number, because the mean of its divisors is an integer number (387690588).

Almost surely, 2^1550566001 is an apocalyptic number.

It is an amenable number.

1550566001 is a deficient number, since it is larger than the sum of its proper divisors (196351).

1550566001 is an equidigital number, since it uses as much as digits as its factorization.

1550566001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196350.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1550566001 is about 39377.2269338510. The cubic root of 1550566001 is about 1157.4353767565.

The spelling of 1550566001 in words is "one billion, five hundred fifty million, five hundred sixty-six thousand, one".