2551015420 has 96 divisors (see below), whose sum is σ = 5719633920. Its totient is φ = 954132480.

The previous prime is 2551015403. The next prime is 2551015429. The reversal of 2551015420 is 245101552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551015429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2745516 + ... + 2746444.

It is an arithmetic number, because the mean of its divisors is an integer number (59579520).

Almost surely, 2^2551015420 is an apocalyptic number.

2551015420 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 2551015420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2859816960).

2551015420 is an abundant number, since it is smaller than the sum of its proper divisors (3168618500).

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

2551015420 is a wasteful number, since it uses less digits than its factorization.

2551015420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1113 counting only the distinct ones).

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

The square root of 2551015420 is about 50507.5778472894. The cubic root of 2551015420 is about 1366.3785256775.

Adding to 2551015420 its reverse (245101552), we get a palindrome (2796116972).

The spelling of 2551015420 in words is "two billion, five hundred fifty-one million, fifteen thousand, four hundred twenty".