220554340431 has 16 divisors (see below), whose sum is σ = 298288604160. Its totient is φ = 144929183840.

The previous prime is 220554340423. The next prime is 220554340483. The reversal of 220554340431 is 134043455022.

It is a cyclic number.

It is not a de Polignac number, because 220554340431 - 2³ = 220554340423 is a prime.

It is a super-2 number, since 2×220554340431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220554340392 and 220554340401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220554340411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741901 + ... + 995753.

It is an arithmetic number, because the mean of its divisors is an integer number (18643037760).

Almost surely, 2^220554340431 is an apocalyptic number.

220554340431 is a deficient number, since it is larger than the sum of its proper divisors (77734263729).

220554340431 is a wasteful number, since it uses less digits than its factorization.

220554340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258006.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 220554340431 its reverse (134043455022), we get a palindrome (354597795453).

The spelling of 220554340431 in words is "two hundred twenty billion, five hundred fifty-four million, three hundred forty thousand, four hundred thirty-one".