2551001020 has 12 divisors (see below), whose sum is σ = 5357102184. Its totient is φ = 1020400400.

The previous prime is 2551001003. The next prime is 2551001021. The reversal of 2551001020 is 201001552.

2551001020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2551000985 and 2551001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551001021) 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, 63775006 + ... + 63775045.

It is an arithmetic number, because the mean of its divisors is an integer number (446425182).

Almost surely, 2^2551001020 is an apocalyptic number.

2551001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551001020 is an abundant number, since it is smaller than the sum of its proper divisors (2806101164).

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

2551001020 is a wasteful number, since it uses less digits than its factorization.

2551001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127550060 (or 127550058 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2551001020 is about 50507.4352942218. The cubic root of 2551001020 is about 1366.3759546898.

Adding to 2551001020 its reverse (201001552), we get a palindrome (2752002572).

The spelling of 2551001020 in words is "two billion, five hundred fifty-one million, one thousand, twenty".