2025212521 has 4 divisors (see below), whose sum is σ = 2063424132. Its totient is φ = 1987000912.

The previous prime is 2025212459. The next prime is 2025212531. The reversal of 2025212521 is 1252125202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1441265296 + 583947225 = 37964^2 + 24165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025212521 - 2¹³ = 2025204329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2025212492 and 2025212501.

It is not an unprimeable number, because it can be changed into a prime (2025212531) 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, 19105726 + ... + 19105831.

It is an arithmetic number, because the mean of its divisors is an integer number (515856033).

Almost surely, 2^2025212521 is an apocalyptic number.

It is an amenable number.

2025212521 is a deficient number, since it is larger than the sum of its proper divisors (38211611).

2025212521 is an equidigital number, since it uses as much as digits as its factorization.

2025212521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38211610.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2025212521 is about 45002.3612824927. The cubic root of 2025212521 is about 1265.1932549608.

Adding to 2025212521 its reverse (1252125202), we get a palindrome (3277337723).

It can be divided in two parts, 2025 and 212521, that multiplied together give a square (430355025 = 20745²).

The spelling of 2025212521 in words is "two billion, twenty-five million, two hundred twelve thousand, five hundred twenty-one".