64340031 has 16 divisors (see below), whose sum is σ = 99705600. Its totient is φ = 36141888.

The previous prime is 64340027. The next prime is 64340051. The reversal of 64340031 is 13004346.

It is not a de Polignac number, because 64340031 - 2² = 64340027 is a prime.

It is a super-2 number, since 2×64340031² = 8279279178161922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64340051) 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, 24726 + ... + 27203.

It is an arithmetic number, because the mean of its divisors is an integer number (6231600).

Almost surely, 2^64340031 is an apocalyptic number.

64340031 is a deficient number, since it is larger than the sum of its proper divisors (35365569).

64340031 is a wasteful number, since it uses less digits than its factorization.

64340031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51998.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 64340031 is about 8021.2237844359. The cubic root of 64340031 is about 400.7071470376.

Adding to 64340031 its reverse (13004346), we get a palindrome (77344377).

The spelling of 64340031 in words is "sixty-four million, three hundred forty thousand, thirty-one".