2318731 has 2 divisors, whose sum is σ = 2318732. Its totient is φ = 2318730.

The previous prime is 2318711. The next prime is 2318737. The reversal of 2318731 is 1378132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2318731 is a prime.

It is a super-2 number, since 2×2318731² = 10753026900722, which contains 22 as substring.

2318731 is a lucky number.

It is equal to p₁₇₀₇₇₃ and since 2318731 and 170773 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 2318696 and 2318705.

It is not a weakly prime, because it can be changed into another prime (2318737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159365 + 1159366.

It is an arithmetic number, because the mean of its divisors is an integer number (1159366).

2^2318731 is an apocalyptic number.

2318731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2318731 is an equidigital number, since it uses as much as digits as its factorization.

2318731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 2318731 is about 1522.7379945348. The cubic root of 2318731 is about 132.3579776462.

The spelling of 2318731 in words is "two million, three hundred eighteen thousand, seven hundred thirty-one".