64500431 has 8 divisors (see below), whose sum is σ = 69315120. Its totient is φ = 59799168.

The previous prime is 64500409. The next prime is 64500463. The reversal of 64500431 is 13400546.

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 a de Polignac number, because none of the positive numbers 2^k-64500431 is a prime.

It is a super-2 number, since 2×64500431² = 8320611198371522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64500397 and 64500406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64500481) 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, 27176 + ... + 29453.

It is an arithmetic number, because the mean of its divisors is an integer number (8664390).

Almost surely, 2^64500431 is an apocalyptic number.

64500431 is a deficient number, since it is larger than the sum of its proper divisors (4814689).

64500431 is a wasteful number, since it uses less digits than its factorization.

64500431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56713.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 64500431 is about 8031.2160349476. The cubic root of 64500431 is about 401.0398589741.

Adding to 64500431 its reverse (13400546), we get a palindrome (77900977).

The spelling of 64500431 in words is "sixty-four million, five hundred thousand, four hundred thirty-one".