65219197 has 4 divisors (see below), whose sum is σ = 66981916. Its totient is φ = 63456480.

The previous prime is 65219183. The next prime is 65219201. The reversal of 65219197 is 79191256.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61873956 + 3345241 = 7866^2 + 1829^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65219197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65219117) 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, 881304 + ... + 881377.

It is an arithmetic number, because the mean of its divisors is an integer number (16745479).

Almost surely, 2^65219197 is an apocalyptic number.

It is an amenable number.

65219197 is a deficient number, since it is larger than the sum of its proper divisors (1762719).

65219197 is a wasteful number, since it uses less digits than its factorization.

65219197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762718.

The product of its digits is 34020, while the sum is 40.

The square root of 65219197 is about 8075.8403277925. The cubic root of 65219197 is about 402.5240333887.

The spelling of 65219197 in words is "sixty-five million, two hundred nineteen thousand, one hundred ninety-seven".