65121316 has 24 divisors (see below), whose sum is σ = 123480000. Its totient is φ = 29872032.

The previous prime is 65121311. The next prime is 65121383. The reversal of 65121316 is 61312156.

It is not an unprimeable number, because it can be changed into a prime (65121311) 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, 4935 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (5145000).

Almost surely, 2^65121316 is an apocalyptic number.

It is an amenable number.

65121316 is a deficient number, since it is larger than the sum of its proper divisors (58358684).

65121316 is a wasteful number, since it uses less digits than its factorization.

65121316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7683 (or 7681 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 65121316 is about 8069.7779399436. Note that the first 3 decimals coincide. The cubic root of 65121316 is about 402.3225631498.

The spelling of 65121316 in words is "sixty-five million, one hundred twenty-one thousand, three hundred sixteen".