2231515225 has 12 divisors (see below), whose sum is σ = 2767707900. Its totient is φ = 1784806400.

The previous prime is 2231515219. The next prime is 2231515309. The reversal of 2231515225 is 5225151322.

It can be written as a sum of positive squares in 6 ways, for example, as 10843849 + 2220671376 = 3293^2 + 47124^2 .

It is not a de Polignac number, because 2231515225 - 2⁵ = 2231515193 is a prime.

It is a super-3 number, since 3×2231515225³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2231515193 and 2231515202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154305 + ... + 168145.

It is an arithmetic number, because the mean of its divisors is an integer number (230642325).

Almost surely, 2^2231515225 is an apocalyptic number.

2231515225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2231515225 is a deficient number, since it is larger than the sum of its proper divisors (536192675).

2231515225 is a wasteful number, since it uses less digits than its factorization.

2231515225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20300 (or 20295 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 2231515225 is about 47238.9164249139. The cubic root of 2231515225 is about 1306.7723944006.

Adding to 2231515225 its reverse (5225151322), we get a palindrome (7456666547).

The spelling of 2231515225 in words is "two billion, two hundred thirty-one million, five hundred fifteen thousand, two hundred twenty-five".