2151023977 has 2 divisors, whose sum is σ = 2151023978. Its totient is φ = 2151023976.

The previous prime is 2151023893. The next prime is 2151023993. The reversal of 2151023977 is 7793201512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2139895081 + 11128896 = 46259^2 + 3336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151023977 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151023477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075511988 + 1075511989.

It is an arithmetic number, because the mean of its divisors is an integer number (1075511989).

Almost surely, 2^2151023977 is an apocalyptic number.

It is an amenable number.

2151023977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151023977 is an equidigital number, since it uses as much as digits as its factorization.

2151023977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 2151023977 is about 46379.1329910338. The cubic root of 2151023977 is about 1290.8677487898.

The spelling of 2151023977 in words is "two billion, one hundred fifty-one million, twenty-three thousand, nine hundred seventy-seven".