2512215521 has 16 divisors (see below), whose sum is σ = 2594686608. Its totient is φ = 2431392000.

The previous prime is 2512215499. The next prime is 2512215547. The reversal of 2512215521 is 1255122152.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8614225 + 2503601296 = 2935^2 + 50036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2512215521 is a prime.

It is a super-2 number, since 2×2512215521² = 12622453647906602882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2512215581) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1064675 + ... + 1067031.

It is an arithmetic number, because the mean of its divisors is an integer number (162167913).

Almost surely, 2^2512215521 is an apocalyptic number.

It is an amenable number.

2512215521 is a deficient number, since it is larger than the sum of its proper divisors (82471087).

2512215521 is a wasteful number, since it uses less digits than its factorization.

2512215521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692.

The product of its digits is 2000, while the sum is 26.

The square root of 2512215521 is about 50122.0063544946. The cubic root of 2512215521 is about 1359.4157526875.

Adding to 2512215521 its reverse (1255122152), we get a palindrome (3767337673).

The spelling of 2512215521 in words is "two billion, five hundred twelve million, two hundred fifteen thousand, five hundred twenty-one".