1551566001 has 8 divisors (see below), whose sum is σ = 2069743104. Its totient is φ = 1033883120.

The previous prime is 1551565999. The next prime is 1551566057. The reversal of 1551566001 is 1006651551.

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 1551566001 - 2¹ = 1551565999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1551566001.

It is not an unprimeable number, because it can be changed into a prime (1551566801) 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, 116166 + ... + 128831.

It is an arithmetic number, because the mean of its divisors is an integer number (258717888).

Almost surely, 2^1551566001 is an apocalyptic number.

It is an amenable number.

1551566001 is a deficient number, since it is larger than the sum of its proper divisors (518177103).

1551566001 is a wasteful number, since it uses less digits than its factorization.

1551566001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247111.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 1551566001 is about 39389.9225817975. The cubic root of 1551566001 is about 1157.6841432597.

The spelling of 1551566001 in words is "one billion, five hundred fifty-one million, five hundred sixty-six thousand, one".