2131156723 has 2 divisors, whose sum is σ = 2131156724. Its totient is φ = 2131156722.

The previous prime is 2131156711. The next prime is 2131156739. The reversal of 2131156723 is 3276511312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131156723 - 2⁵ = 2131156691 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131136723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065578361 + 1065578362.

It is an arithmetic number, because the mean of its divisors is an integer number (1065578362).

Almost surely, 2^2131156723 is an apocalyptic number.

2131156723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131156723 is an equidigital number, since it uses as much as digits as its factorization.

2131156723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 2131156723 is about 46164.4530239447. The cubic root of 2131156723 is about 1286.8812192064.

The spelling of 2131156723 in words is "two billion, one hundred thirty-one million, one hundred fifty-six thousand, seven hundred twenty-three".