2551405020 has 24 divisors (see below), whose sum is σ = 7143934224. Its totient is φ = 680374656.

The previous prime is 2551404983. The next prime is 2551405039. The reversal of 2551405020 is 205041552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21261649 + ... + 21261768.

It is an arithmetic number, because the mean of its divisors is an integer number (297663926).

Almost surely, 2^2551405020 is an apocalyptic number.

2551405020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551405020 is an abundant number, since it is smaller than the sum of its proper divisors (4592529204).

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

2551405020 is a wasteful number, since it uses less digits than its factorization.

2551405020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42523429 (or 42523427 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 2551405020 is about 50511.4345470409. The cubic root of 2551405020 is about 1366.4480815063.

Adding to 2551405020 its reverse (205041552), we get a palindrome (2756446572).

The spelling of 2551405020 in words is "two billion, five hundred fifty-one million, four hundred five thousand, twenty".