2131545979 has 2 divisors, whose sum is σ = 2131545980. Its totient is φ = 2131545978.

The previous prime is 2131545967. The next prime is 2131546031. The reversal of 2131545979 is 9795451312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131545979 - 2⁷ = 2131545851 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131545929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065772989 + 1065772990.

It is an arithmetic number, because the mean of its divisors is an integer number (1065772990).

Almost surely, 2^2131545979 is an apocalyptic number.

2131545979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131545979 is an equidigital number, since it uses as much as digits as its factorization.

2131545979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 46.

The square root of 2131545979 is about 46168.6688025548. The cubic root of 2131545979 is about 1286.9595641002.

The spelling of 2131545979 in words is "two billion, one hundred thirty-one million, five hundred forty-five thousand, nine hundred seventy-nine".