220520072 has 8 divisors (see below), whose sum is σ = 413475150. Its totient is φ = 110260032.

The previous prime is 220520033. The next prime is 220520087. The reversal of 220520072 is 270025022.

It can be written as a sum of positive squares in only one way, i.e., 161137636 + 59382436 = 12694^2 + 7706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13782497 + ... + 13782512.

Almost surely, 2^220520072 is an apocalyptic number.

It is an amenable number.

220520072 is a deficient number, since it is larger than the sum of its proper divisors (192955078).

220520072 is a wasteful number, since it uses less digits than its factorization.

220520072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27565015 (or 27565011 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 220520072 is about 14849.9182489332. The cubic root of 220520072 is about 604.1563926994.

Adding to 220520072 its reverse (270025022), we get a palindrome (490545094).

The spelling of 220520072 in words is "two hundred twenty million, five hundred twenty thousand, seventy-two".