2551405320 has 48 divisors (see below), whose sum is σ = 8292068460. Its totient is φ = 680374656.

The previous prime is 2551405289. The next prime is 2551405349. The reversal of 2551405320 is 235041552.

It is a happy number.

2551405320 is a `hidden beast` number, since 2 + 551 + 40 + 53 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2546817156 + 4588164 = 50466^2 + 2142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3543259 + ... + 3543978.

Almost surely, 2^2551405320 is an apocalyptic number.

2551405320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551405320 is an abundant number, since it is smaller than the sum of its proper divisors (5740663140).

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

2551405320 is a wasteful number, since it uses less digits than its factorization.

2551405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7087254 (or 7087247 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2551405320 is about 50511.4375166655. The cubic root of 2551405320 is about 1366.4481350630.

Adding to 2551405320 its reverse (235041552), we get a palindrome (2786446872).

The spelling of 2551405320 in words is "two billion, five hundred fifty-one million, four hundred five thousand, three hundred twenty".