220401434550 has 96 divisors (see below), whose sum is σ = 605186158464. Its totient is φ = 52633152000.

The previous prime is 220401434507. The next prime is 220401434563. The reversal of 220401434550 is 55434104022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 886291 + ... + 1107390.

It is an arithmetic number, because the mean of its divisors is an integer number (6304022484).

Almost surely, 2^220401434550 is an apocalyptic number.

220401434550 is an abundant number, since it is smaller than the sum of its proper divisors (384784723914).

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

220401434550 is a wasteful number, since it uses less digits than its factorization.

220401434550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993774 (or 1993769 counting only the distinct ones).

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

Adding to 220401434550 its reverse (55434104022), we get a palindrome (275835538572).

The spelling of 220401434550 in words is "two hundred twenty billion, four hundred one million, four hundred thirty-four thousand, five hundred fifty".