231418025 has 12 divisors (see below), whose sum is σ = 303838812. Its totient is φ = 174243840.

The previous prime is 231418021. The next prime is 231418073. The reversal of 231418025 is 520814132.

231418025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2319529 + 229098496 = 1523^2 + 15136^2 .

It is not a de Polignac number, because 231418025 - 2² = 231418021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231417985 and 231418003.

It is not an unprimeable number, because it can be changed into a prime (231418021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271832 + ... + 272681.

It is an arithmetic number, because the mean of its divisors is an integer number (25319901).

Almost surely, 2^231418025 is an apocalyptic number.

231418025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231418025 is a deficient number, since it is larger than the sum of its proper divisors (72420787).

231418025 is a wasteful number, since it uses less digits than its factorization.

231418025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544540 (or 544535 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 231418025 is about 15212.4299505372. The cubic root of 231418025 is about 613.9491384834.

The spelling of 231418025 in words is "two hundred thirty-one million, four hundred eighteen thousand, twenty-five".