2054311531 has 4 divisors (see below), whose sum is σ = 2055172392. Its totient is φ = 2053450672.

The previous prime is 2054311529. The next prime is 2054311537. The reversal of 2054311531 is 1351134502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2054311531 - 2¹ = 2054311529 is a prime.

It is a super-2 number, since 2×2054311531² = 8440391732799127922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2054311496 and 2054311505.

It is not an unprimeable number, because it can be changed into a prime (2054311537) 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, 426841 + ... + 431626.

It is an arithmetic number, because the mean of its divisors is an integer number (513793098).

Almost surely, 2^2054311531 is an apocalyptic number.

2054311531 is a deficient number, since it is larger than the sum of its proper divisors (860861).

2054311531 is an equidigital number, since it uses as much as digits as its factorization.

2054311531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860860.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2054311531 is about 45324.5135770920. The cubic root of 2054311531 is about 1271.2240520450.

The spelling of 2054311531 in words is "two billion, fifty-four million, three hundred eleven thousand, five hundred thirty-one".