65021898 has 16 divisors (see below), whose sum is σ = 131690880. Its totient is φ = 21399456.

The previous prime is 65021863. The next prime is 65021921. The reversal of 65021898 is 89812056.

65021898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68115 + ... + 69062.

It is an arithmetic number, because the mean of its divisors is an integer number (8230680).

Almost surely, 2^65021898 is an apocalyptic number.

65021898 is an abundant number, since it is smaller than the sum of its proper divisors (66668982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65021898 is a wasteful number, since it uses less digits than its factorization.

65021898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137261.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 65021898 is about 8063.6156902471. The cubic root of 65021898 is about 402.1177225087.

The spelling of 65021898 in words is "sixty-five million, twenty-one thousand, eight hundred ninety-eight".