220545642 has 32 divisors (see below), whose sum is σ = 458627904. Its totient is φ = 70646400.

The previous prime is 220545541. The next prime is 220545653. The reversal of 220545642 is 246545022.

It is a happy number.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9792 + ... + 23172.

It is an arithmetic number, because the mean of its divisors is an integer number (14332122).

Almost surely, 2^220545642 is an apocalyptic number.

220545642 is an abundant number, since it is smaller than the sum of its proper divisors (238082262).

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

220545642 is a wasteful number, since it uses less digits than its factorization.

220545642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 220545642 is about 14850.7791714778. The cubic root of 220545642 is about 604.1797430786.

The spelling of 220545642 in words is "two hundred twenty million, five hundred forty-five thousand, six hundred forty-two".