64163131 has 8 divisors (see below), whose sum is σ = 66429504. Its totient is φ = 61934400.

The previous prime is 64163107. The next prime is 64163159. The reversal of 64163131 is 13136146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64163131 - 2⁹ = 64162619 is a prime.

It is a super-2 number, since 2×64163131² = 8233814759446322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64163096 and 64163105.

It is not an unprimeable number, because it can be changed into a prime (64163101) 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, 5920 + ... + 12781.

It is an arithmetic number, because the mean of its divisors is an integer number (8303688).

Almost surely, 2^64163131 is an apocalyptic number.

64163131 is a deficient number, since it is larger than the sum of its proper divisors (2266373).

64163131 is a wasteful number, since it uses less digits than its factorization.

64163131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18821.

The product of its digits is 1296, while the sum is 25.

The square root of 64163131 is about 8010.1891987643. The cubic root of 64163131 is about 400.3395679025.

Adding to 64163131 its reverse (13136146), we get a palindrome (77299277).

The spelling of 64163131 in words is "sixty-four million, one hundred sixty-three thousand, one hundred thirty-one".