51919031 has 2 divisors, whose sum is σ = 51919032. Its totient is φ = 51919030.

The previous prime is 51919013. The next prime is 51919061. The reversal of 51919031 is 13091915.

51919031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (51919013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51919031 - 2⁶ = 51918967 is a prime.

It is a super-2 number, since 2×51919031² = 5391171559957922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51918985 and 51919003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51919061) 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, 25959515 + 25959516.

It is an arithmetic number, because the mean of its divisors is an integer number (25959516).

Almost surely, 2^51919031 is an apocalyptic number.

51919031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51919031 is an equidigital number, since it uses as much as digits as its factorization.

51919031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 51919031 is about 7205.4861737429. The cubic root of 51919031 is about 373.0572857507.

The spelling of 51919031 in words is "fifty-one million, nine hundred nineteen thousand, thirty-one".