220061538 has 12 divisors (see below), whose sum is σ = 476800038. Its totient is φ = 73353840.

The previous prime is 220061521. The next prime is 220061551. The reversal of 220061538 is 835160022.

It can be written as a sum of positive squares in only one way, i.e., 208138329 + 11923209 = 14427^2 + 3453^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6112803 + ... + 6112838.

Almost surely, 2^220061538 is an apocalyptic number.

220061538 is an abundant number, since it is smaller than the sum of its proper divisors (256738500).

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

220061538 is a wasteful number, since it uses less digits than its factorization.

220061538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12225649 (or 12225646 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 220061538 is about 14834.4712747034. The cubic root of 220061538 is about 603.7373552899.

The spelling of 220061538 in words is "two hundred twenty million, sixty-one thousand, five hundred thirty-eight".