51818087 has 2 divisors, whose sum is σ = 51818088. Its totient is φ = 51818086.

The previous prime is 51818083. The next prime is 51818141. The reversal of 51818087 is 78081815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51818087 - 2² = 51818083 is a prime.

It is a super-2 number, since 2×51818087² = 5370228280679138, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51818087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51818083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25909043 + 25909044.

It is an arithmetic number, because the mean of its divisors is an integer number (25909044).

Almost surely, 2^51818087 is an apocalyptic number.

51818087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51818087 is an equidigital number, since it uses as much as digits as its factorization.

51818087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 38.

The square root of 51818087 is about 7198.4781030437. The cubic root of 51818087 is about 372.8153556666.

It can be divided in two parts, 5181808 and 7, that added together give a palindrome (5181815).

The spelling of 51818087 in words is "fifty-one million, eight hundred eighteen thousand, eighty-seven".