311461481 has 4 divisors (see below), whose sum is σ = 311537232. Its totient is φ = 311385732.

The previous prime is 311461441. The next prime is 311461483. The reversal of 311461481 is 184164113.

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 not a de Polignac number, because 311461481 - 2¹⁸ = 311199337 is a prime.

It is a super-2 number, since 2×311461481² = 194016508293426722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311461483) 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, 31331 + ... + 40056.

It is an arithmetic number, because the mean of its divisors is an integer number (77884308).

Almost surely, 2^311461481 is an apocalyptic number.

It is an amenable number.

311461481 is a deficient number, since it is larger than the sum of its proper divisors (75751).

311461481 is an equidigital number, since it uses as much as digits as its factorization.

311461481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75750.

The product of its digits is 2304, while the sum is 29.

The square root of 311461481 is about 17648.2713317764. The cubic root of 311461481 is about 677.8518434085.

The spelling of 311461481 in words is "three hundred eleven million, four hundred sixty-one thousand, four hundred eighty-one".