67226381 has 4 divisors (see below), whose sum is σ = 71180892. Its totient is φ = 63271872.

The previous prime is 67226371. The next prime is 67226407. The reversal of 67226381 is 18362276.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56761156 + 10465225 = 7534^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 67226381 - 2²⁶ = 117517 is a prime.

It is a super-2 number, since 2×67226381² = 9038772604714322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67226371) 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, 1977230 + ... + 1977263.

It is an arithmetic number, because the mean of its divisors is an integer number (17795223).

Almost surely, 2^67226381 is an apocalyptic number.

It is an amenable number.

67226381 is a deficient number, since it is larger than the sum of its proper divisors (3954511).

67226381 is a wasteful number, since it uses less digits than its factorization.

67226381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954510.

The product of its digits is 24192, while the sum is 35.

The square root of 67226381 is about 8199.1695311172. The cubic root of 67226381 is about 406.6117372582.

The spelling of 67226381 in words is "sixty-seven million, two hundred twenty-six thousand, three hundred eighty-one".