51226279 has 4 divisors (see below), whose sum is σ = 55166776. Its totient is φ = 47285784.

The previous prime is 51226277. The next prime is 51226303. The reversal of 51226279 is 97262215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97262215 = 5 ⋅19452443.

It is not a de Polignac number, because 51226279 - 2¹ = 51226277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970229 + ... + 1970254.

It is an arithmetic number, because the mean of its divisors is an integer number (13791694).

Almost surely, 2^51226279 is an apocalyptic number.

51226279 is a deficient number, since it is larger than the sum of its proper divisors (3940497).

51226279 is a wasteful number, since it uses less digits than its factorization.

51226279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940496.

The product of its digits is 15120, while the sum is 34.

The square root of 51226279 is about 7157.2535933834. The cubic root of 51226279 is about 371.3906251527.

The spelling of 51226279 in words is "fifty-one million, two hundred twenty-six thousand, two hundred seventy-nine".