1551606001 has 4 divisors (see below), whose sum is σ = 1692661104. Its totient is φ = 1410550900.

The previous prime is 1551605999. The next prime is 1551606047. The reversal of 1551606001 is 1006061551.

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.

It is not a de Polignac number, because 1551606001 - 2¹ = 1551605999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551604001) 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, 70527535 + ... + 70527556.

It is an arithmetic number, because the mean of its divisors is an integer number (423165276).

Almost surely, 2^1551606001 is an apocalyptic number.

1551606001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1551606001 is a deficient number, since it is larger than the sum of its proper divisors (141055103).

1551606001 is a wasteful number, since it uses less digits than its factorization.

1551606001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141055102.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1551606001 is about 39390.4303226050. The cubic root of 1551606001 is about 1157.6940916962.

Adding to 1551606001 its reverse (1006061551), we get a palindrome (2557667552).

It can be divided in two parts, 155160 and 6001, that added together give a palindrome (161161).

The spelling of 1551606001 in words is "one billion, five hundred fifty-one million, six hundred six thousand, one".