64218142 has 4 divisors (see below), whose sum is σ = 96327216. Its totient is φ = 32109070.

The previous prime is 64218127. The next prime is 64218149. The reversal of 64218142 is 24181246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24181246 = 2 ⋅12090623.

It is a self number, because there is not a number n which added to its sum of digits gives 64218142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64218149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16054534 + ... + 16054537.

It is an arithmetic number, because the mean of its divisors is an integer number (24081804).

Almost surely, 2^64218142 is an apocalyptic number.

64218142 is a deficient number, since it is larger than the sum of its proper divisors (32109074).

64218142 is a wasteful number, since it uses less digits than its factorization.

64218142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32109073.

The product of its digits is 3072, while the sum is 28.

The square root of 64218142 is about 8013.6222770979. The cubic root of 64218142 is about 400.4539471351.

Adding to 64218142 its reverse (24181246), we get a palindrome (88399388).

The spelling of 64218142 in words is "sixty-four million, two hundred eighteen thousand, one hundred forty-two".