2136731 has 2 divisors, whose sum is σ = 2136732. Its totient is φ = 2136730.

The previous prime is 2136707. The next prime is 2136733. The reversal of 2136731 is 1376312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2136731 is a prime.

It is a super-2 number, since 2×2136731² = 9131238732722, which contains 22 as substring.

Together with 2136733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2136697 and 2136706.

It is not a weakly prime, because it can be changed into another prime (2136733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068365 + 1068366.

It is an arithmetic number, because the mean of its divisors is an integer number (1068366).

2^2136731 is an apocalyptic number.

2136731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136731 is an equidigital number, since it uses as much as digits as its factorization.

2136731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 23.

The square root of 2136731 is about 1461.7561356122. The cubic root of 2136731 is about 128.8002235957.

The spelling of 2136731 in words is "two million, one hundred thirty-six thousand, seven hundred thirty-one".