2015211225 has 24 divisors (see below), whose sum is σ = 3339782272. Its totient is φ = 1072209600.

The previous prime is 2015211223. The next prime is 2015211277. The reversal of 2015211225 is 5221125102.

It is not a de Polignac number, because 2015211225 - 2¹ = 2015211223 is a prime.

It is a super-2 number, since 2×2015211225² = 8122152562732001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015211223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337 + ... + 63486.

Almost surely, 2^2015211225 is an apocalyptic number.

2015211225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2015211225 is a deficient number, since it is larger than the sum of its proper divisors (1324571047).

2015211225 is a wasteful number, since it uses less digits than its factorization.

2015211225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64257 (or 64252 counting only the distinct ones).

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

The square root of 2015211225 is about 44891.1040741927. The cubic root of 2015211225 is about 1263.1071431935.

Adding to 2015211225 its reverse (5221125102), we get a palindrome (7236336327).

The spelling of 2015211225 in words is "two billion, fifteen million, two hundred eleven thousand, two hundred twenty-five".