6551731 has 2 divisors, whose sum is σ = 6551732. Its totient is φ = 6551730.

The previous prime is 6551719. The next prime is 6551737. The reversal of 6551731 is 1371556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6551731 - 2⁷ = 6551603 is a prime.

It is a super-2 number, since 2×6551731² = 85850358192722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6551731.

It is not a weakly prime, because it can be changed into another prime (6551737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275865 + 3275866.

It is an arithmetic number, because the mean of its divisors is an integer number (3275866).

Almost surely, 2^6551731 is an apocalyptic number.

6551731 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551731 is an equidigital number, since it uses as much as digits as its factorization.

6551731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 28.

The square root of 6551731 is about 2559.6349349077. The cubic root of 6551731 is about 187.1193438760.

The spelling of 6551731 in words is "six million, five hundred fifty-one thousand, seven hundred thirty-one".