5651 has 2 divisors, whose sum is σ = 5652. Its totient is φ = 5650.

The previous prime is 5647. The next prime is 5653. The reversal of 5651 is 1565.

5651 is nontrivially palindromic in base 7.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5651 - 2² = 5647 is a prime.

Together with 5653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5653) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2825 + 2826.

It is an arithmetic number, because the mean of its divisors is an integer number (2826).

2⁵⁶⁵¹ is an apocalyptic number.

5651 is a deficient number, since it is larger than the sum of its proper divisors (1).

5651 is an equidigital number, since it uses as much as digits as its factorization.

5651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150, while the sum is 17.

The square root of 5651 is about 75.1731334986. The cubic root of 5651 is about 17.8118256644.

It can be divided in two parts, 5 and 651, that added together give a palindrome (656).

The spelling of 5651 in words is "five thousand, six hundred fifty-one".