31112461 has 4 divisors (see below), whose sum is σ = 31124412. Its totient is φ = 31100512.

The previous prime is 31112453. The next prime is 31112479. The reversal of 31112461 is 16421113.

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 18224361 + 12888100 = 4269^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112461 - 2³ = 31112453 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 (31112401) 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, 226 + ... + 7891.

It is an arithmetic number, because the mean of its divisors is an integer number (7781103).

Almost surely, 2^31112461 is an apocalyptic number.

It is an amenable number.

31112461 is a deficient number, since it is larger than the sum of its proper divisors (11951).

31112461 is an equidigital number, since it uses as much as digits as its factorization.

31112461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11950.

The product of its digits is 144, while the sum is 19.

The square root of 31112461 is about 5577.8545158511. The cubic root of 31112461 is about 314.5174807858.

Adding to 31112461 its reverse (16421113), we get a palindrome (47533574).

The spelling of 31112461 in words is "thirty-one million, one hundred twelve thousand, four hundred sixty-one".