5631001 has 4 divisors (see below), whose sum is σ = 5708212. Its totient is φ = 5553792.

The previous prime is 5630987. The next prime is 5631007. The reversal of 5631001 is 1001365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1001365 = 5 ⋅200273.

It can be written as a sum of positive squares in 2 ways, for example, as 4473225 + 1157776 = 2115^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 5631001 - 2¹⁵ = 5598233 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5631007) 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, 38496 + ... + 38641.

It is an arithmetic number, because the mean of its divisors is an integer number (1427053).

Almost surely, 2^5631001 is an apocalyptic number.

It is an amenable number.

5631001 is a deficient number, since it is larger than the sum of its proper divisors (77211).

5631001 is an equidigital number, since it uses as much as digits as its factorization.

5631001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77210.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 5631001 is about 2372.9730297667. The cubic root of 5631001 is about 177.9078869449.

Adding to 5631001 its reverse (1001365), we get a palindrome (6632366).

The spelling of 5631001 in words is "five million, six hundred thirty-one thousand, one".