2521212015 has 32 divisors (see below), whose sum is σ = 4612308480. Its totient is φ = 1152031104.

The previous prime is 2521211977. The next prime is 2521212037. The reversal of 2521212015 is 5102121252.

2521212015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2521212015 - 2⁷ = 2521211887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2521211982 and 2521212000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318121 + ... + 325949.

It is an arithmetic number, because the mean of its divisors is an integer number (144134640).

Almost surely, 2^2521212015 is an apocalyptic number.

2521212015 is a deficient number, since it is larger than the sum of its proper divisors (2091096465).

2521212015 is a wasteful number, since it uses less digits than its factorization.

2521212015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10911.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2521212015 is about 50211.6720992241. The cubic root of 2521212015 is about 1361.0365538774.

Adding to 2521212015 its reverse (5102121252), we get a palindrome (7623333267).

The spelling of 2521212015 in words is "two billion, five hundred twenty-one million, two hundred twelve thousand, fifteen".