64220351 has 8 divisors (see below), whose sum is σ = 69576864. Its totient is φ = 58923360.

The previous prime is 64220327. The next prime is 64220357. The reversal of 64220351 is 15302246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64220351 - 2⁶ = 64220287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12620 + ... + 16961.

It is an arithmetic number, because the mean of its divisors is an integer number (8697108).

Almost surely, 2^64220351 is an apocalyptic number.

64220351 is a deficient number, since it is larger than the sum of its proper divisors (5356513).

64220351 is a wasteful number, since it uses less digits than its factorization.

64220351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29761.

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

The square root of 64220351 is about 8013.7601037216. The cubic root of 64220351 is about 400.4585387380.

Adding to 64220351 its reverse (15302246), we get a palindrome (79522597).

The spelling of 64220351 in words is "sixty-four million, two hundred twenty thousand, three hundred fifty-one".