61579220 has 24 divisors (see below), whose sum is σ = 129905664. Its totient is φ = 24519456.

The previous prime is 61579207. The next prime is 61579229. The reversal of 61579220 is 2297516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61579229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2444 + ... + 11363.

It is an arithmetic number, because the mean of its divisors is an integer number (5412736).

Almost surely, 2^61579220 is an apocalyptic number.

It is an amenable number.

61579220 is an abundant number, since it is smaller than the sum of its proper divisors (68326444).

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

61579220 is a wasteful number, since it uses less digits than its factorization.

61579220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14039 (or 14037 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 61579220 is about 7847.2428278982. The cubic root of 61579220 is about 394.8917505004.

The spelling of 61579220 in words is "sixty-one million, five hundred seventy-nine thousand, two hundred twenty".