51226387 has 4 divisors (see below), whose sum is σ = 51240816. Its totient is φ = 51211960.

The previous prime is 51226367. The next prime is 51226393. The reversal of 51226387 is 78362215.

It is a happy number.

51226387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51226387 is a prime.

It is a super-3 number, since 3×51226387³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51226367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253 + ... + 10369.

It is an arithmetic number, because the mean of its divisors is an integer number (12810204).

Almost surely, 2^51226387 is an apocalyptic number.

51226387 is a deficient number, since it is larger than the sum of its proper divisors (14429).

51226387 is an equidigital number, since it uses as much as digits as its factorization.

51226387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428.

The product of its digits is 20160, while the sum is 34.

The square root of 51226387 is about 7157.2611381729. The cubic root of 51226387 is about 371.3908861526.

The spelling of 51226387 in words is "fifty-one million, two hundred twenty-six thousand, three hundred eighty-seven".