220453642 has 4 divisors (see below), whose sum is σ = 330680466. Its totient is φ = 110226820.

The previous prime is 220453633. The next prime is 220453661. The reversal of 220453642 is 246354022.

220453642 is digitally balanced in base 2, 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: 246354022 = 2 ⋅123177011.

It can be written as a sum of positive squares in only one way, i.e., 116229961 + 104223681 = 10781^2 + 10209^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 220453642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55113409 + ... + 55113412.

Almost surely, 2^220453642 is an apocalyptic number.

220453642 is a deficient number, since it is larger than the sum of its proper divisors (110226824).

220453642 is a wasteful number, since it uses less digits than its factorization.

220453642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110226823.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 220453642 is about 14847.6813678096. The cubic root of 220453642 is about 604.0957207622.

The spelling of 220453642 in words is "two hundred twenty million, four hundred fifty-three thousand, six hundred forty-two".