2231631625 has 16 divisors (see below), whose sum is σ = 2830742928. Its totient is φ = 1756032000.

The previous prime is 2231631617. The next prime is 2231631641. The reversal of 2231631625 is 5261361322.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2055352896 + 176278729 = 45336^2 + 13277^2 .

It is not a de Polignac number, because 2231631625 - 2³ = 2231631617 is a prime.

It is a super-3 number, since 3×2231631625³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian 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, 138712 + ... + 153961.

It is an arithmetic number, because the mean of its divisors is an integer number (176921433).

Almost surely, 2^2231631625 is an apocalyptic number.

2231631625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2231631625 is a deficient number, since it is larger than the sum of its proper divisors (599111303).

2231631625 is an equidigital number, since it uses as much as digits as its factorization.

2231631625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292749 (or 292739 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 2231631625 is about 47240.1484438819. The cubic root of 2231631625 is about 1306.7951152347.

Adding to 2231631625 its reverse (5261361322), we get a palindrome (7492992947).

The spelling of 2231631625 in words is "two billion, two hundred thirty-one million, six hundred thirty-one thousand, six hundred twenty-five".