67531257 has 12 divisors (see below), whose sum is σ = 97621680. Its totient is φ = 44985528.

The previous prime is 67531249. The next prime is 67531283. The reversal of 67531257 is 75213576.

It is not a de Polignac number, because 67531257 - 2³ = 67531249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67531957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14794 + ... + 18812.

It is an arithmetic number, because the mean of its divisors is an integer number (8135140).

Almost surely, 2^67531257 is an apocalyptic number.

It is an amenable number.

67531257 is a deficient number, since it is larger than the sum of its proper divisors (30090423).

67531257 is a wasteful number, since it uses less digits than its factorization.

67531257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892 (or 5889 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 67531257 is about 8217.7403828546. The cubic root of 67531257 is about 407.2254806067.

The spelling of 67531257 in words is "sixty-seven million, five hundred thirty-one thousand, two hundred fifty-seven".