64222231 has 4 divisors (see below), whose sum is σ = 64315864. Its totient is φ = 64128600.

The previous prime is 64222229. The next prime is 64222237. The reversal of 64222231 is 13222246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64222231 - 2¹ = 64222229 is a prime.

It is a super-2 number, since 2×64222231² = 8248989909234722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64222237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45780 + ... + 47161.

It is an arithmetic number, because the mean of its divisors is an integer number (16078966).

Almost surely, 2^64222231 is an apocalyptic number.

64222231 is a deficient number, since it is larger than the sum of its proper divisors (93633).

64222231 is an equidigital number, since it uses as much as digits as its factorization.

64222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93632.

The product of its digits is 1152, while the sum is 22.

The square root of 64222231 is about 8013.8774011087. The cubic root of 64222231 is about 400.4624464023.

Adding to 64222231 its reverse (13222246), we get a palindrome (77444477).

The spelling of 64222231 in words is "sixty-four million, two hundred twenty-two thousand, two hundred thirty-one".