220145542 has 4 divisors (see below), whose sum is σ = 330218316. Its totient is φ = 110072770.

The previous prime is 220145521. The next prime is 220145543. The reversal of 220145542 is 245541022.

220145542 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245541022 = 2 ⋅122770511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220145543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55036384 + ... + 55036387.

It is an arithmetic number, because the mean of its divisors is an integer number (82554579).

Almost surely, 2^220145542 is an apocalyptic number.

220145542 is a deficient number, since it is larger than the sum of its proper divisors (110072774).

220145542 is a wasteful number, since it uses less digits than its factorization.

220145542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110072773.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 220145542 is about 14837.3023828457. The cubic root of 220145542 is about 603.8141669874.

Adding to 220145542 its reverse (245541022), we get a palindrome (465686564).

It can be divided in two parts, 22014 and 5542, that added together give a square (27556 = 166²).

The spelling of 220145542 in words is "two hundred twenty million, one hundred forty-five thousand, five hundred forty-two".