2145011225 has 24 divisors (see below), whose sum is σ = 3041555328. Its totient is φ = 1470009600.

The previous prime is 2145011203. The next prime is 2145011233. The reversal of 2145011225 is 5221105412.

It is not a de Polignac number, because 2145011225 - 2⁸ = 2145010969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145011225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504860 + ... + 509090.

It is an arithmetic number, because the mean of its divisors is an integer number (126731472).

Almost surely, 2^2145011225 is an apocalyptic number.

2145011225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145011225 is a deficient number, since it is larger than the sum of its proper divisors (896544103).

2145011225 is a wasteful number, since it uses less digits than its factorization.

2145011225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145 (or 7140 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2145011225 is about 46314.2658907598. The cubic root of 2145011225 is about 1289.6638398562.

Adding to 2145011225 its reverse (5221105412), we get a palindrome (7366116637).

The spelling of 2145011225 in words is "two billion, one hundred forty-five million, eleven thousand, two hundred twenty-five".