51988319 has 2 divisors, whose sum is σ = 51988320. Its totient is φ = 51988318.

The previous prime is 51988309. The next prime is 51988327. The reversal of 51988319 is 91388915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51988319 - 2²⁴ = 35211103 is a prime.

It is a super-2 number, since 2×51988319² = 5405570624891522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51988319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51988309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25994159 + 25994160.

It is an arithmetic number, because the mean of its divisors is an integer number (25994160).

Almost surely, 2^51988319 is an apocalyptic number.

51988319 is a deficient number, since it is larger than the sum of its proper divisors (1).

51988319 is an equidigital number, since it uses as much as digits as its factorization.

51988319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 44.

The square root of 51988319 is about 7210.2925738142. The cubic root of 51988319 is about 373.2231652151.

The spelling of 51988319 in words is "fifty-one million, nine hundred eighty-eight thousand, three hundred nineteen".