255155431420 has 12 divisors (see below), whose sum is σ = 535826406024. Its totient is φ = 102062172560.

The previous prime is 255155431403. The next prime is 255155431423. The reversal of 255155431420 is 24134551552.

It is a self number, because there is not a number n which added to its sum of digits gives 255155431420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255155431423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6378885766 + ... + 6378885805.

It is an arithmetic number, because the mean of its divisors is an integer number (44652200502).

Almost surely, 2^255155431420 is an apocalyptic number.

255155431420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255155431420 is an abundant number, since it is smaller than the sum of its proper divisors (280670974604).

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

255155431420 is a wasteful number, since it uses less digits than its factorization.

255155431420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12757771580 (or 12757771578 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 255155431420 its reverse (24134551552), we get a palindrome (279289982972).

The spelling of 255155431420 in words is "two hundred fifty-five billion, one hundred fifty-five million, four hundred thirty-one thousand, four hundred twenty".