51151999 has 2 divisors, whose sum is σ = 51152000. Its totient is φ = 51151998.

The previous prime is 51151981. The next prime is 51152011. The reversal of 51151999 is 99915115.

51151999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51151999 - 2²¹ = 49054847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51151909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25575999 + 25576000.

It is an arithmetic number, because the mean of its divisors is an integer number (25576000).

Almost surely, 2^51151999 is an apocalyptic number.

51151999 is a deficient number, since it is larger than the sum of its proper divisors (1).

51151999 is an equidigital number, since it uses as much as digits as its factorization.

51151999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18225, while the sum is 40.

The square root of 51151999 is about 7152.0625696368. The cubic root of 51151999 is about 371.2110282679.

The spelling of 51151999 in words is "fifty-one million, one hundred fifty-one thousand, nine hundred ninety-nine".