5551001 has 4 divisors (see below), whose sum is σ = 5557632. Its totient is φ = 5544372.

The previous prime is 5550997. The next prime is 5551003. The reversal of 5551001 is 1001555.

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 a cyclic number.

It is not a de Polignac number, because 5551001 - 2² = 5550997 is a prime.

It is a super-2 number, since 2×5551001² = 61627224204002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841 + ... + 3806.

It is an arithmetic number, because the mean of its divisors is an integer number (1389408).

Almost surely, 2^5551001 is an apocalyptic number.

It is an amenable number.

5551001 is a deficient number, since it is larger than the sum of its proper divisors (6631).

5551001 is an equidigital number, since it uses as much as digits as its factorization.

5551001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 5551001 is about 2356.0562387176. The cubic root of 5551001 is about 177.0613489233.

Adding to 5551001 its reverse (1001555), we get a palindrome (6552556).

It can be divided in two parts, 555 and 1001, that multiplied together give a palindrome (555555).

The spelling of 5551001 in words is "five million, five hundred fifty-one thousand, one".