1973256151 has 2 divisors, whose sum is σ = 1973256152. Its totient is φ = 1973256150.

The previous prime is 1973256149. The next prime is 1973256157. The reversal of 1973256151 is 1516523791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1973256151 - 2¹ = 1973256149 is a prime.

Together with 1973256149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973256157) 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, 986628075 + 986628076.

It is an arithmetic number, because the mean of its divisors is an integer number (986628076).

Almost surely, 2^1973256151 is an apocalyptic number.

1973256151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973256151 is an equidigital number, since it uses as much as digits as its factorization.

1973256151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 1973256151 is about 44421.3479196658. The cubic root of 1973256151 is about 1254.2799742772.

The spelling of 1973256151 in words is "one billion, nine hundred seventy-three million, two hundred fifty-six thousand, one hundred fifty-one".