51100999 has 2 divisors, whose sum is σ = 51101000. Its totient is φ = 51100998.

The previous prime is 51100979. The next prime is 51101003. The reversal of 51100999 is 99900115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51100999 - 2¹⁵ = 51068231 is a prime.

It is a super-2 number, since 2×51100999² = 5222624197596002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51100939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550499 + 25550500.

It is an arithmetic number, because the mean of its divisors is an integer number (25550500).

Almost surely, 2^51100999 is an apocalyptic number.

51100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

51100999 is an equidigital number, since it uses as much as digits as its factorization.

51100999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 34.

The square root of 51100999 is about 7148.4962754414. The cubic root of 51100999 is about 371.0876179213.

The spelling of 51100999 in words is "fifty-one million, one hundred thousand, nine hundred ninety-nine".