51100019 has 2 divisors, whose sum is σ = 51100020. Its totient is φ = 51100018.

The previous prime is 51099991. The next prime is 51100033. The reversal of 51100019 is 91000115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51100019 - 2¹² = 51095923 is a prime.

It is a super-2 number, since 2×51100019² = 5222423883600722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51100619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550009 + 25550010.

It is an arithmetic number, because the mean of its divisors is an integer number (25550010).

Almost surely, 2^51100019 is an apocalyptic number.

51100019 is a deficient number, since it is larger than the sum of its proper divisors (1).

51100019 is an equidigital number, since it uses as much as digits as its factorization.

51100019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 51100019 is about 7148.4277292283. The cubic root of 51100019 is about 371.0852457029.

The spelling of 51100019 in words is "fifty-one million, one hundred thousand, nineteen".