231011025 has 48 divisors (see below), whose sum is σ = 459494400. Its totient is φ = 100042560.

The previous prime is 231011023. The next prime is 231011069. The reversal of 231011025 is 520110132.

It is not a de Polignac number, because 231011025 - 2¹ = 231011023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 231010995 and 231011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1605 + ... + 21554.

It is an arithmetic number, because the mean of its divisors is an integer number (9572800).

Almost surely, 2^231011025 is an apocalyptic number.

231011025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231011025 is a deficient number, since it is larger than the sum of its proper divisors (228483375).

231011025 is a wasteful number, since it uses less digits than its factorization.

231011025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23198 (or 23193 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 231011025 is about 15199.0468451150. The cubic root of 231011025 is about 613.5890052989.

Adding to 231011025 its reverse (520110132), we get a palindrome (751121157).

The spelling of 231011025 in words is "two hundred thirty-one million, eleven thousand, twenty-five".