6131551 has 2 divisors, whose sum is σ = 6131552. Its totient is φ = 6131550.

The previous prime is 6131549. The next prime is 6131561. The reversal of 6131551 is 1551316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6131551 - 2¹ = 6131549 is a prime.

Together with 6131549, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6131561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065775 + 3065776.

It is an arithmetic number, because the mean of its divisors is an integer number (3065776).

Almost surely, 2^6131551 is an apocalyptic number.

6131551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131551 is an equidigital number, since it uses as much as digits as its factorization.

6131551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 6131551 is about 2476.1968823177. The cubic root of 6131551 is about 183.0304924952.

Adding to 6131551 its reverse (1551316), we get a palindrome (7682867).

The spelling of 6131551 in words is "six million, one hundred thirty-one thousand, five hundred fifty-one".