65214381 has 4 divisors (see below), whose sum is σ = 86952512. Its totient is φ = 43476252.

The previous prime is 65214353. The next prime is 65214419. The reversal of 65214381 is 18341256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-65214381 is a prime.

It is a super-2 number, since 2×65214381² = 8505830978426322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65214311) 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, 10869061 + ... + 10869066.

It is an arithmetic number, because the mean of its divisors is an integer number (21738128).

Almost surely, 2^65214381 is an apocalyptic number.

It is an amenable number.

65214381 is a deficient number, since it is larger than the sum of its proper divisors (21738131).

65214381 is a wasteful number, since it uses less digits than its factorization.

65214381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21738130.

The product of its digits is 5760, while the sum is 30.

The square root of 65214381 is about 8075.5421489829. The cubic root of 65214381 is about 402.5141252453.

The spelling of 65214381 in words is "sixty-five million, two hundred fourteen thousand, three hundred eighty-one".