51228887 has 2 divisors, whose sum is σ = 51228888. Its totient is φ = 51228886.

The previous prime is 51228869. The next prime is 51228911. The reversal of 51228887 is 78882215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51228887 - 2⁶ = 51228823 is a prime.

It is a super-3 number, since 3×51228887³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51228817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25614443 + 25614444.

It is an arithmetic number, because the mean of its divisors is an integer number (25614444).

Almost surely, 2^51228887 is an apocalyptic number.

51228887 is a deficient number, since it is larger than the sum of its proper divisors (1).

51228887 is an equidigital number, since it uses as much as digits as its factorization.

51228887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 41.

The square root of 51228887 is about 7157.4357838544. The cubic root of 51228887 is about 371.3969277142.

The spelling of 51228887 in words is "fifty-one million, two hundred twenty-eight thousand, eight hundred eighty-seven".