51085499 has 2 divisors, whose sum is σ = 51085500. Its totient is φ = 51085498.

The previous prime is 51085477. The next prime is 51085511. The reversal of 51085499 is 99458015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51085499 - 2²⁴ = 34308283 is a prime.

It is not a weakly prime, because it can be changed into another prime (51085409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25542749 + 25542750.

It is an arithmetic number, because the mean of its divisors is an integer number (25542750).

Almost surely, 2^51085499 is an apocalyptic number.

51085499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51085499 is an equidigital number, since it uses as much as digits as its factorization.

51085499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 51085499 is about 7147.4120491266. The cubic root of 51085499 is about 371.0500945862.

The spelling of 51085499 in words is "fifty-one million, eighty-five thousand, four hundred ninety-nine".