64197255 has 32 divisors (see below), whose sum is σ = 107702784. Its totient is φ = 32590976.

The previous prime is 64197247. The next prime is 64197283. The reversal of 64197255 is 55279146.

It is a cyclic number.

It is not a de Polignac number, because 64197255 - 2³ = 64197247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109072 + ... + 109658.

It is an arithmetic number, because the mean of its divisors is an integer number (3365712).

Almost surely, 2^64197255 is an apocalyptic number.

64197255 is a deficient number, since it is larger than the sum of its proper divisors (43505529).

64197255 is a wasteful number, since it uses less digits than its factorization.

64197255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its digits is 75600, while the sum is 39.

The square root of 64197255 is about 8012.3189527128. The cubic root of 64197255 is about 400.4105264426.

The spelling of 64197255 in words is "sixty-four million, one hundred ninety-seven thousand, two hundred fifty-five".