64159220 has 12 divisors (see below), whose sum is σ = 134734404. Its totient is φ = 25663680.

The previous prime is 64159217. The next prime is 64159231. The reversal of 64159220 is 2295146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36048016 + 28111204 = 6004^2 + 5302^2 .

It is a super-2 number, since 2×64159220² = 8232811022016800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603961 + ... + 1604000.

It is an arithmetic number, because the mean of its divisors is an integer number (11227867).

Almost surely, 2^64159220 is an apocalyptic number.

It is an amenable number.

64159220 is an abundant number, since it is smaller than the sum of its proper divisors (70575184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64159220 is a wasteful number, since it uses less digits than its factorization.

64159220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207970 (or 3207968 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 64159220 is about 8009.9450684758. The cubic root of 64159220 is about 400.3314336368.

The spelling of 64159220 in words is "sixty-four million, one hundred fifty-nine thousand, two hundred twenty".