2021015025 has 36 divisors (see below), whose sum is σ = 3626015068. Its totient is φ = 1076042880.

The previous prime is 2021015011. The next prime is 2021015041. The reversal of 2021015025 is 5205101202.

It can be written as a sum of positive squares in 6 ways, for example, as 222576561 + 1798438464 = 14919^2 + 42408^2 .

It is not a de Polignac number, because 2021015025 - 2⁸ = 2021014769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021014989 and 2021015007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130599 + ... + 145251.

Almost surely, 2^2021015025 is an apocalyptic number.

2021015025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021015025 is a deficient number, since it is larger than the sum of its proper divisors (1605000043).

2021015025 is a wasteful number, since it uses less digits than its factorization.

2021015025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15282 (or 15274 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2021015025 is about 44955.7006952400. The cubic root of 2021015025 is about 1264.3185620937.

Adding to 2021015025 its reverse (5205101202), we get a palindrome (7226116227).

The spelling of 2021015025 in words is "two billion, twenty-one million, fifteen thousand, twenty-five".