2500021611225 has 72 divisors (see below), whose sum is σ = 4574335259520. Its totient is φ = 1304620248960.

The previous prime is 2500021611223. The next prime is 2500021611233. The reversal of 2500021611225 is 5221161200052.

2500021611225 is a `hidden beast` number, since 2 + 5 + 0 + 0 + 0 + 21 + 611 + 2 + 25 = 666.

It is not a de Polignac number, because 2500021611225 - 2¹ = 2500021611223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2500021611221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41286271 + ... + 41346779.

It is an arithmetic number, because the mean of its divisors is an integer number (63532434160).

Almost surely, 2^{2500021611225} is an apocalyptic number.

2500021611225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2500021611225 is a deficient number, since it is larger than the sum of its proper divisors (2074313648295).

2500021611225 is a wasteful number, since it uses less digits than its factorization.

2500021611225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64479 (or 64471 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 2500021611225 its reverse (5221161200052), we get a palindrome (7721182811277).

The spelling of 2500021611225 in words is "two trillion, five hundred billion, twenty-one million, six hundred eleven thousand, two hundred twenty-five".