51900047 has 2 divisors, whose sum is σ = 51900048. Its totient is φ = 51900046.

The previous prime is 51900019. The next prime is 51900049. The reversal of 51900047 is 74000915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51900047 - 2²⁴ = 35122831 is a prime.

It is a super-2 number, since 2×51900047² = 5387229757204418, which contains 22 as substring.

Together with 51900049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51899989 and 51900025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51900049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950023 + 25950024.

It is an arithmetic number, because the mean of its divisors is an integer number (25950024).

Almost surely, 2^51900047 is an apocalyptic number.

51900047 is a deficient number, since it is larger than the sum of its proper divisors (1).

51900047 is an equidigital number, since it uses as much as digits as its factorization.

51900047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 51900047 is about 7204.1687237321. The cubic root of 51900047 is about 373.0118112061.

The spelling of 51900047 in words is "fifty-one million, nine hundred thousand, forty-seven".