2551415020 has 96 divisors (see below), whose sum is σ = 6760889856. Its totient is φ = 785625600.

The previous prime is 2551415003. The next prime is 2551415021. The reversal of 2551415020 is 205141552.

It is not an unprimeable number, because it can be changed into a prime (2551415021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117840 + ... + 137800.

It is an arithmetic number, because the mean of its divisors is an integer number (70425936).

Almost surely, 2^2551415020 is an apocalyptic number.

2551415020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551415020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3380444928).

2551415020 is an abundant number, since it is smaller than the sum of its proper divisors (4209474836).

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

2551415020 is a wasteful number, since it uses less digits than its factorization.

2551415020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20071 (or 20069 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2551415020 is about 50511.5335344315. The cubic root of 2551415020 is about 1366.4498667270.

Adding to 2551415020 its reverse (205141552), we get a palindrome (2756556572).

The spelling of 2551415020 in words is "two billion, five hundred fifty-one million, four hundred fifteen thousand, twenty".