64220237 has 8 divisors (see below), whose sum is σ = 69014016. Its totient is φ = 59539392.

The previous prime is 64220213. The next prime is 64220249. The reversal of 64220237 is 73202246.

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-64220237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220287) 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, 27053 + ... + 29330.

It is an arithmetic number, because the mean of its divisors is an integer number (8626752).

Almost surely, 2^64220237 is an apocalyptic number.

64220237 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

64220237 is a deficient number, since it is larger than the sum of its proper divisors (4793779).

64220237 is a wasteful number, since it uses less digits than its factorization.

64220237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56467.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 64220237 is about 8013.7529909525. The cubic root of 64220237 is about 400.4583017815.

Subtracting 64220237 from its reverse (73202246), we obtain a square (8982009 = 2997²).

The spelling of 64220237 in words is "sixty-four million, two hundred twenty thousand, two hundred thirty-seven".