2131225445 has 16 divisors (see below), whose sum is σ = 2626948800. Its totient is φ = 1659275904.

The previous prime is 2131225433. The next prime is 2131225487. The reversal of 2131225445 is 5445221312.

It is not a de Polignac number, because 2131225445 - 2⁸ = 2131225189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10520 + ... + 66129.

It is an arithmetic number, because the mean of its divisors is an integer number (164184300).

Almost surely, 2^2131225445 is an apocalyptic number.

It is an amenable number.

2131225445 is a deficient number, since it is larger than the sum of its proper divisors (495723355).

2131225445 is an equidigital number, since it uses as much as digits as its factorization.

2131225445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76804.

The product of its digits is 9600, while the sum is 29.

The square root of 2131225445 is about 46165.1973352221. The cubic root of 2131225445 is about 1286.8950514600.

Adding to 2131225445 its reverse (5445221312), we get a palindrome (7576446757).

The spelling of 2131225445 in words is "two billion, one hundred thirty-one million, two hundred twenty-five thousand, four hundred forty-five".