223420305605542 has 16 divisors (see below), whose sum is σ = 343879410631680. Its totient is φ = 108808308434952.

The previous prime is 223420305605459. The next prime is 223420305605543. The reversal of 223420305605542 is 245506503024322.

It is a super-2 number, since 2×223420305605542² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223420305605543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3618228918 + ... + 3618290665.

It is an arithmetic number, because the mean of its divisors is an integer number (21492463164480).

Almost surely, 2^{223420305605542} is an apocalyptic number.

223420305605542 is a deficient number, since it is larger than the sum of its proper divisors (120459105026138).

223420305605542 is a wasteful number, since it uses less digits than its factorization.

223420305605542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236519987.

The product of its (nonzero) digits is 1728000, while the sum is 43.

Adding to 223420305605542 its reverse (245506503024322), we get a palindrome (468926808629864).

The spelling of 223420305605542 in words is "two hundred twenty-three trillion, four hundred twenty billion, three hundred five million, six hundred five thousand, five hundred forty-two".