231633025 has 12 divisors (see below), whose sum is σ = 309319612. Its totient is φ = 171051840.

The previous prime is 231633001. The next prime is 231633029. The reversal of 231633025 is 520336132.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2322576 + 229310449 = 1524^2 + 15143^2 .

It is a de Polignac number, because none of the positive numbers 2^k-231633025 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231633029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356034 + ... + 356683.

Almost surely, 2^231633025 is an apocalyptic number.

231633025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231633025 is a deficient number, since it is larger than the sum of its proper divisors (77686587).

231633025 is a wasteful number, since it uses less digits than its factorization.

231633025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712740 (or 712735 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 231633025 is about 15219.4948996345. The cubic root of 231633025 is about 614.1392104074.

Adding to 231633025 its reverse (520336132), we get a palindrome (751969157).

The spelling of 231633025 in words is "two hundred thirty-one million, six hundred thirty-three thousand, twenty-five".