6531157 has 4 divisors (see below), whose sum is σ = 6545056. Its totient is φ = 6517260.

The previous prime is 6531139. The next prime is 6531181. The reversal of 6531157 is 7511356.

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 6531157 - 2⁷ = 6531029 is a prime.

It is a Duffinian number.

6531157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6219 + ... + 7192.

It is an arithmetic number, because the mean of its divisors is an integer number (1636264).

Almost surely, 2^6531157 is an apocalyptic number.

It is an amenable number.

6531157 is a deficient number, since it is larger than the sum of its proper divisors (13899).

6531157 is a wasteful number, since it uses less digits than its factorization.

6531157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13898.

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

The square root of 6531157 is about 2555.6128423531. The cubic root of 6531157 is about 186.9232720194.

The spelling of 6531157 in words is "six million, five hundred thirty-one thousand, one hundred fifty-seven".