51226551 has 12 divisors (see below), whose sum is σ = 74123712. Its totient is φ = 34091136.

The previous prime is 51226529. The next prime is 51226561. The reversal of 51226551 is 15562215.

51226551 is a `hidden beast` number, since 5 + 1 + 2 + 2 + 655 + 1 = 666.

It is not a de Polignac number, because 51226551 - 2⁹ = 51226039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (6176976).

Almost surely, 2^51226551 is an apocalyptic number.

51226551 is a deficient number, since it is larger than the sum of its proper divisors (22897161).

51226551 is a wasteful number, since it uses less digits than its factorization.

51226551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990 (or 9987 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 51226551 is about 7157.2725950602. The cubic root of 51226551 is about 371.3912824851.

Adding to 51226551 its reverse (15562215), we get a palindrome (66788766).

The spelling of 51226551 in words is "fifty-one million, two hundred twenty-six thousand, five hundred fifty-one".