2531223145 has 16 divisors (see below), whose sum is σ = 3316829760. Its totient is φ = 1839096000.

The previous prime is 2531223119. The next prime is 2531223151. The reversal of 2531223145 is 5413221352.

It is not a de Polignac number, because 2531223145 - 2⁵ = 2531223113 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 15 ways as a sum of consecutive naturals, for example, 35911 + ... + 79699.

It is an arithmetic number, because the mean of its divisors is an integer number (207301860).

Almost surely, 2^2531223145 is an apocalyptic number.

It is an amenable number.

2531223145 is a deficient number, since it is larger than the sum of its proper divisors (785606615).

2531223145 is a wasteful number, since it uses less digits than its factorization.

2531223145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44856.

The product of its digits is 7200, while the sum is 28.

The square root of 2531223145 is about 50311.2626059017. The cubic root of 2531223145 is about 1362.8356249751.

Adding to 2531223145 its reverse (5413221352), we get a palindrome (7944444497).

The spelling of 2531223145 in words is "two billion, five hundred thirty-one million, two hundred twenty-three thousand, one hundred forty-five".