231295481 has 4 divisors (see below), whose sum is σ = 231326964. Its totient is φ = 231264000.

The previous prime is 231295453. The next prime is 231295483. The reversal of 231295481 is 184592132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 35295481 + 196000000 = 5941^2 + 14000^2 .

It is a cyclic number.

It is not a de Polignac number, because 231295481 - 2²² = 227101177 is a prime.

It is a super-2 number, since 2×231295481² = 106995199062042722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231295483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (57831741).

Almost surely, 2^231295481 is an apocalyptic number.

It is an amenable number.

231295481 is a deficient number, since it is larger than the sum of its proper divisors (31483).

231295481 is a wasteful number, since it uses less digits than its factorization.

231295481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31482.

The product of its digits is 17280, while the sum is 35.

The square root of 231295481 is about 15208.4016582940. The cubic root of 231295481 is about 613.8407501140.

The spelling of 231295481 in words is "two hundred thirty-one million, two hundred ninety-five thousand, four hundred eighty-one".