2000156531 has 2 divisors, whose sum is σ = 2000156532. Its totient is φ = 2000156530.

The previous prime is 2000156519. The next prime is 2000156533. The reversal of 2000156531 is 1356510002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2000156531 - 2²⁶ = 1933047667 is a prime.

It is a super-2 number, since 2×2000156531² = 8001252297003907922, which contains 22 as substring.

Together with 2000156533, 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 = 2000156497 and 2000156506.

It is not a weakly prime, because it can be changed into another prime (2000156533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000078265 + 1000078266.

It is an arithmetic number, because the mean of its divisors is an integer number (1000078266).

Almost surely, 2^2000156531 is an apocalyptic number.

2000156531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000156531 is an equidigital number, since it uses as much as digits as its factorization.

2000156531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2000156531 is about 44723.1095855375. The cubic root of 2000156531 is about 1259.9539184877.

Adding to 2000156531 its reverse (1356510002), we get a palindrome (3356666533).

The spelling of 2000156531 in words is "two billion, one hundred fifty-six thousand, five hundred thirty-one".