64199331 has 16 divisors (see below), whose sum is σ = 108697600. Its totient is φ = 36685224.

The previous prime is 64199323. The next prime is 64199383. The reversal of 64199331 is 13399146.

64199331 is a `hidden beast` number, since 641 + 9 + 9 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 64199331 - 2³ = 64199323 is a prime.

It is a super-2 number, since 2×64199331² = 8243108201695122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64199131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169651 + ... + 170028.

It is an arithmetic number, because the mean of its divisors is an integer number (6793600).

Almost surely, 2^64199331 is an apocalyptic number.

64199331 is a deficient number, since it is larger than the sum of its proper divisors (44498269).

64199331 is a wasteful number, since it uses less digits than its factorization.

64199331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339695 (or 339689 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 64199331 is about 8012.4485021746. The cubic root of 64199331 is about 400.4148425321.

The spelling of 64199331 in words is "sixty-four million, one hundred ninety-nine thousand, three hundred thirty-one".