1551340001 has 4 divisors (see below), whose sum is σ = 1589177604. Its totient is φ = 1513502400.

The previous prime is 1551339997. The next prime is 1551340013. The reversal of 1551340001 is 1000431551.

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 790959376 + 760380625 = 28124^2 + 27575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551340001 - 2² = 1551339997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551340081) 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, 18918740 + ... + 18918821.

It is an arithmetic number, because the mean of its divisors is an integer number (397294401).

Almost surely, 2^1551340001 is an apocalyptic number.

It is an amenable number.

1551340001 is a deficient number, since it is larger than the sum of its proper divisors (37837603).

1551340001 is an equidigital number, since it uses as much as digits as its factorization.

1551340001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37837602.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1551340001 is about 39387.0537232731. The cubic root of 1551340001 is about 1157.6279313807.

Adding to 1551340001 its reverse (1000431551), we get a palindrome (2551771552).

The spelling of 1551340001 in words is "one billion, five hundred fifty-one million, three hundred forty thousand, one".