220157731643 has 4 divisors (see below), whose sum is σ = 223889218680. Its totient is φ = 216426244608.

The previous prime is 220157731639. The next prime is 220157731663. The reversal of 220157731643 is 346137751022.

It is a happy number.

220157731643 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.

It is a cyclic number.

It is not a de Polignac number, because 220157731643 - 2² = 220157731639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220157731643.

It is not an unprimeable number, because it can be changed into a prime (220157731613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1865743430 + ... + 1865743547.

It is an arithmetic number, because the mean of its divisors is an integer number (55972304670).

Almost surely, 2^220157731643 is an apocalyptic number.

220157731643 is a deficient number, since it is larger than the sum of its proper divisors (3731487037).

220157731643 is an equidigital number, since it uses as much as digits as its factorization.

220157731643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731487036.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 220157731643 in words is "two hundred twenty billion, one hundred fifty-seven million, seven hundred thirty-one thousand, six hundred forty-three".