231015461 has 4 divisors (see below), whose sum is σ = 233174592. Its totient is φ = 228856332.

The previous prime is 231015451. The next prime is 231015467. The reversal of 231015461 is 164510132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231015461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231015467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079405 + ... + 1079618.

It is an arithmetic number, because the mean of its divisors is an integer number (58293648).

Almost surely, 2^231015461 is an apocalyptic number.

It is an amenable number.

231015461 is a deficient number, since it is larger than the sum of its proper divisors (2159131).

231015461 is a wasteful number, since it uses less digits than its factorization.

231015461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159130.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 231015461 is about 15199.1927746180. The cubic root of 231015461 is about 613.5929327643.

Adding to 231015461 its reverse (164510132), we get a palindrome (395525593).

It can be divided in two parts, 2310 and 15461, that added together give a palindrome (17771).

The spelling of 231015461 in words is "two hundred thirty-one million, fifteen thousand, four hundred sixty-one".