2045731 has 2 divisors, whose sum is σ = 2045732. Its totient is φ = 2045730.

The previous prime is 2045713. The next prime is 2045753. The reversal of 2045731 is 1375402.

Together with previous prime (2045713) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (2045753) can be obtained adding 2045731 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2045731 - 2⁵ = 2045699 is a prime.

It is a super-2 number, since 2×2045731² = 8370030648722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2045761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022865 + 1022866.

It is an arithmetic number, because the mean of its divisors is an integer number (1022866).

2^2045731 is an apocalyptic number.

2045731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045731 is an equidigital number, since it uses as much as digits as its factorization.

2045731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2045731 is about 1430.2905299274. The cubic root of 2045731 is about 126.9451682204.

The spelling of 2045731 in words is "two million, forty-five thousand, seven hundred thirty-one".