67256531 has 6 divisors (see below), whose sum is σ = 70308420. Its totient is φ = 64331828.

The previous prime is 67256513. The next prime is 67256551. The reversal of 67256531 is 13565276.

It is not a de Polignac number, because 67256531 - 2⁶ = 67256467 is a prime.

It is a super-3 number, since 3×67256531³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67256491 and 67256500.

It is not an unprimeable number, because it can be changed into a prime (67256551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63041 + ... + 64098.

It is an arithmetic number, because the mean of its divisors is an integer number (11718070).

Almost surely, 2^67256531 is an apocalyptic number.

67256531 is a deficient number, since it is larger than the sum of its proper divisors (3051889).

67256531 is a wasteful number, since it uses less digits than its factorization.

67256531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127185 (or 127162 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 67256531 is about 8201.0079258589. The cubic root of 67256531 is about 406.6725145476.

The spelling of 67256531 in words is "sixty-seven million, two hundred fifty-six thousand, five hundred thirty-one".