231211325 has 12 divisors (see below), whose sum is σ = 286945920. Its totient is φ = 184811760.

The previous prime is 231211291. The next prime is 231211327. The reversal of 231211325 is 523112132.

It is not a de Polignac number, because 231211325 - 2²⁶ = 164102461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231211297 and 231211306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231211327) 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, 32762 + ... + 39188.

It is an arithmetic number, because the mean of its divisors is an integer number (23912160).

Almost surely, 2^231211325 is an apocalyptic number.

231211325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231211325 is a deficient number, since it is larger than the sum of its proper divisors (55734595).

231211325 is a wasteful number, since it uses less digits than its factorization.

231211325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876 (or 7871 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 231211325 is about 15205.6346464066. The cubic root of 231211325 is about 613.7662931921.

Adding to 231211325 its reverse (523112132), we get a palindrome (754323457).

The spelling of 231211325 in words is "two hundred thirty-one million, two hundred eleven thousand, three hundred twenty-five".