2931481 has 4 divisors (see below), whose sum is σ = 3350272. Its totient is φ = 2512692.

The previous prime is 2931457. The next prime is 2931493. The reversal of 2931481 is 1841392.

It is a happy number.

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 not a de Polignac number, because 2931481 - 2⁹ = 2930969 is a prime.

It is a super-2 number, since 2×2931481² = 17187161706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2931421) 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, 209385 + ... + 209398.

It is an arithmetic number, because the mean of its divisors is an integer number (837568).

2^2931481 is an apocalyptic number.

It is an amenable number.

2931481 is a deficient number, since it is larger than the sum of its proper divisors (418791).

2931481 is an equidigital number, since it uses as much as digits as its factorization.

2931481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418790.

The product of its digits is 1728, while the sum is 28.

The square root of 2931481 is about 1712.1568269291. The cubic root of 2931481 is about 143.1184732250.

The spelling of 2931481 in words is "two million, nine hundred thirty-one thousand, four hundred eighty-one".