255220434 has 96 divisors (see below), whose sum is σ = 655589376. Its totient is φ = 70247520.

The previous prime is 255220423. The next prime is 255220447. The reversal of 255220434 is 434022552.

It is a happy number.

255220434 is a `hidden beast` number, since 2 + 5 + 5 + 220 + 434 = 666.

It is a super-2 number, since 2×255220434² = 130274939862296712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255220398 and 255220407.

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, 420159 + ... + 420765.

It is an arithmetic number, because the mean of its divisors is an integer number (6829056).

Almost surely, 2^255220434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255220434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327794688).

255220434 is an abundant number, since it is smaller than the sum of its proper divisors (400368942).

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

255220434 is a wasteful number, since it uses less digits than its factorization.

255220434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 255220434 is about 15975.6199879692. The cubic root of 255220434 is about 634.3152425903.

Adding to 255220434 its reverse (434022552), we get a palindrome (689242986).

The spelling of 255220434 in words is "two hundred fifty-five million, two hundred twenty thousand, four hundred thirty-four".