1551000001 has 8 divisors (see below), whose sum is σ = 1652303520. Its totient is φ = 1451663712.

The previous prime is 1550999987. The next prime is 1551000019. The reversal of 1551000001 is 1000001551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1551000001 - 2¹¹ = 1550997953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551000901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490180 + ... + 493333.

It is an arithmetic number, because the mean of its divisors is an integer number (206537940).

Almost surely, 2^1551000001 is an apocalyptic number.

It is an amenable number.

1551000001 is a deficient number, since it is larger than the sum of its proper divisors (101303519).

1551000001 is an equidigital number, since it uses as much as digits as its factorization.

1551000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983615.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 1551000001 is about 39382.7373477264. The cubic root of 1551000001 is about 1157.5433545517.

Adding to 1551000001 its reverse (1000001551), we get a palindrome (2551001552).

The spelling of 1551000001 in words is "one billion, five hundred fifty-one million, one", and thus it is an aban number.