1551200551 has 4 divisors (see below), whose sum is σ = 1553659504. Its totient is φ = 1548741600.

The previous prime is 1551200531. The next prime is 1551200561. The reversal of 1551200551 is 1550021551.

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

It is a cyclic number.

It is not a de Polignac number, because 1551200551 - 2⁹ = 1551200039 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 (1551200531) 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, 1228530 + ... + 1229791.

It is an arithmetic number, because the mean of its divisors is an integer number (388414876).

Almost surely, 2^1551200551 is an apocalyptic number.

1551200551 is a deficient number, since it is larger than the sum of its proper divisors (2458953).

1551200551 is an equidigital number, since it uses as much as digits as its factorization.

1551200551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458952.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 1551200551 is about 39385.2834317591. The cubic root of 1551200551 is about 1157.5932439380.

The spelling of 1551200551 in words is "one billion, five hundred fifty-one million, two hundred thousand, five hundred fifty-one".