67120231 has 4 divisors (see below), whose sum is σ = 67300552. Its totient is φ = 66939912.

The previous prime is 67120211. The next prime is 67120237. The reversal of 67120231 is 13202176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67120231 - 2¹⁵ = 67087463 is a prime.

It is a super-2 number, since 2×67120231² = 9010250818986722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67120237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89601 + ... + 90346.

It is an arithmetic number, because the mean of its divisors is an integer number (16825138).

Almost surely, 2^67120231 is an apocalyptic number.

67120231 is a deficient number, since it is larger than the sum of its proper divisors (180321).

67120231 is a wasteful number, since it uses less digits than its factorization.

67120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180320.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 67120231 is about 8192.6937572449. The cubic root of 67120231 is about 406.3976121255.

It can be divided in two parts, 671 and 20231, that added together give a palindrome (20902).

The spelling of 67120231 in words is "sixty-seven million, one hundred twenty thousand, two hundred thirty-one".