64133131 has 8 divisors (see below), whose sum is σ = 67001760. Its totient is φ = 61271232.

The previous prime is 64133119. The next prime is 64133149. The reversal of 64133131 is 13133146.

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 64133131 - 2¹¹ = 64131083 is a prime.

It is a super-2 number, since 2×64133131² = 8226116983726322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64133101) 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, 36141 + ... + 37873.

It is an arithmetic number, because the mean of its divisors is an integer number (8375220).

Almost surely, 2^64133131 is an apocalyptic number.

64133131 is a deficient number, since it is larger than the sum of its proper divisors (2868629).

64133131 is a wasteful number, since it uses less digits than its factorization.

64133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365.

The product of its digits is 648, while the sum is 22.

The square root of 64133131 is about 8008.3163648797. The cubic root of 64133131 is about 400.2771641557.

Adding to 64133131 its reverse (13133146), we get a palindrome (77266277).

The spelling of 64133131 in words is "sixty-four million, one hundred thirty-three thousand, one hundred thirty-one".