65502381 has 8 divisors (see below), whose sum is σ = 99813184. Its totient is φ = 37429920.

The previous prime is 65502347. The next prime is 65502401. The reversal of 65502381 is 18320556.

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

It is not a de Polignac number, because 65502381 - 2²² = 61308077 is a prime.

It is a super-2 number, since 2×65502381² = 8581123833338322, 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 (65502301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559560 + ... + 1559601.

It is an arithmetic number, because the mean of its divisors is an integer number (12476648).

Almost surely, 2^65502381 is an apocalyptic number.

It is an amenable number.

65502381 is a deficient number, since it is larger than the sum of its proper divisors (34310803).

65502381 is a wasteful number, since it uses less digits than its factorization.

65502381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119171.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 65502381 is about 8093.3541254538. The cubic root of 65502381 is about 403.1057832796.

The spelling of 65502381 in words is "sixty-five million, five hundred two thousand, three hundred eighty-one".