63345381 has 16 divisors (see below), whose sum is σ = 96145920. Its totient is φ = 36721520.

The previous prime is 63345379. The next prime is 63345397. The reversal of 63345381 is 18354336.

It is not a de Polignac number, because 63345381 - 2¹ = 63345379 is a prime.

It is a super-2 number, since 2×63345381² = 8025274588070322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63345311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40971 + ... + 42488.

It is an arithmetic number, because the mean of its divisors is an integer number (6009120).

Almost surely, 2^63345381 is an apocalyptic number.

It is an amenable number.

63345381 is a deficient number, since it is larger than the sum of its proper divisors (32800539).

63345381 is a wasteful number, since it uses less digits than its factorization.

63345381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83496.

The product of its digits is 25920, while the sum is 33.

The square root of 63345381 is about 7958.9811533889. The cubic root of 63345381 is about 398.6315340077.

The spelling of 63345381 in words is "sixty-three million, three hundred forty-five thousand, three hundred eighty-one".