2131225145 has 64 divisors (see below), whose sum is σ = 3168668160. Its totient is φ = 1343029248.

The previous prime is 2131225133. The next prime is 2131225171. The reversal of 2131225145 is 5415221312.

It is a cyclic number.

It is not a de Polignac number, because 2131225145 - 2²⁰ = 2130176569 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 6037289 + ... + 6037641.

It is an arithmetic number, because the mean of its divisors is an integer number (49510440).

Almost surely, 2^2131225145 is an apocalyptic number.

It is an amenable number.

2131225145 is a deficient number, since it is larger than the sum of its proper divisors (1037443015).

2131225145 is a wasteful number, since it uses less digits than its factorization.

2131225145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its digits is 2400, while the sum is 26.

The square root of 2131225145 is about 46165.1940860211. The cubic root of 2131225145 is about 1286.8949910771.

Adding to 2131225145 its reverse (5415221312), we get a palindrome (7546446457).

The spelling of 2131225145 in words is "two billion, one hundred thirty-one million, two hundred twenty-five thousand, one hundred forty-five".