67213131 has 8 divisors (see below), whose sum is σ = 89662464. Its totient is φ = 44786280.

The previous prime is 67213109. The next prime is 67213141. The reversal of 67213131 is 13131276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67213131 - 2¹⁵ = 67180363 is a prime.

It is a super-2 number, since 2×67213131² = 9035209957646322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67213141) 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 7 ways as a sum of consecutive naturals, for example, 3450 + ... + 12096.

It is an arithmetic number, because the mean of its divisors is an integer number (11207808).

Almost surely, 2^67213131 is an apocalyptic number.

67213131 is a deficient number, since it is larger than the sum of its proper divisors (22449333).

67213131 is a wasteful number, since it uses less digits than its factorization.

67213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241.

The product of its digits is 756, while the sum is 24.

The square root of 67213131 is about 8198.3614826379. The cubic root of 67213131 is about 406.5850217564.

The spelling of 67213131 in words is "sixty-seven million, two hundred thirteen thousand, one hundred thirty-one".