220431423550 has 36 divisors (see below), whose sum is σ = 443967164640. Its totient is φ = 81390060960.

The previous prime is 220431423533. The next prime is 220431423581. The reversal of 220431423550 is 55324134022.

It is a super-4 number, since 4×220431423550⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13034830 + ... + 13051729.

It is an arithmetic number, because the mean of its divisors is an integer number (12332421240).

Almost surely, 2^220431423550 is an apocalyptic number.

220431423550 is an abundant number, since it is smaller than the sum of its proper divisors (223535741090).

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

220431423550 is a wasteful number, since it uses less digits than its factorization.

220431423550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26086597 (or 26086579 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 220431423550 its reverse (55324134022), we get a palindrome (275755557572).

The spelling of 220431423550 in words is "two hundred twenty billion, four hundred thirty-one million, four hundred twenty-three thousand, five hundred fifty".