63267381 has 6 divisors (see below), whose sum is σ = 91386230. Its totient is φ = 42178248.

The previous prime is 63267343. The next prime is 63267383. The reversal of 63267381 is 18376236.

It is a happy number.

63267381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36796356 + 26471025 = 6066^2 + 5145^2 .

It is not a de Polignac number, because 63267381 - 2⁶ = 63267317 is a prime.

It is a super-2 number, since 2×63267381² = 8005522997198322, 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 (63267383) 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 5 ways as a sum of consecutive naturals, for example, 3514846 + ... + 3514863.

Almost surely, 2^63267381 is an apocalyptic number.

It is an amenable number.

63267381 is a deficient number, since it is larger than the sum of its proper divisors (28118849).

63267381 is a wasteful number, since it uses less digits than its factorization.

63267381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029715 (or 7029712 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 63267381 is about 7954.0795193410. The cubic root of 63267381 is about 398.4678491946.

The spelling of 63267381 in words is "sixty-three million, two hundred sixty-seven thousand, three hundred eighty-one".