64220553 has 8 divisors (see below), whose sum is σ = 95141600. Its totient is φ = 42813684.

The previous prime is 64220539. The next prime is 64220579. The reversal of 64220553 is 35502246.

It is not a de Polignac number, because 64220553 - 2⁵ = 64220521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2378539 = 64220553 / (6 + 4 + 2 + 2 + 0 + 5 + 5 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64220053) 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, 1189243 + ... + 1189296.

It is an arithmetic number, because the mean of its divisors is an integer number (11892700).

Almost surely, 2^64220553 is an apocalyptic number.

It is an amenable number.

64220553 is a deficient number, since it is larger than the sum of its proper divisors (30921047).

64220553 is a wasteful number, since it uses less digits than its factorization.

64220553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378548 (or 2378542 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 64220553 is about 8013.7727070338. The cubic root of 64220553 is about 400.4589586077.

Adding to 64220553 its reverse (35502246), we get a palindrome (99722799).

The spelling of 64220553 in words is "sixty-four million, two hundred twenty thousand, five hundred fifty-three".