51273279 has 12 divisors (see below), whose sum is σ = 77281776. Its totient is φ = 32695872.

The previous prime is 51273259. The next prime is 51273293. The reversal of 51273279 is 97237215.

51273279 is a `hidden beast` number, since 512 + 73 + 2 + 79 = 666.

It is not a de Polignac number, because 51273279 - 2⁷ = 51273151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51273239) 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, 123642 + ... + 124055.

It is an arithmetic number, because the mean of its divisors is an integer number (6440148).

Almost surely, 2^51273279 is an apocalyptic number.

51273279 is a deficient number, since it is larger than the sum of its proper divisors (26008497).

51273279 is a wasteful number, since it uses less digits than its factorization.

51273279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247726 (or 247723 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 51273279 is about 7160.5362229375. The cubic root of 51273279 is about 371.5041737976.

The spelling of 51273279 in words is "fifty-one million, two hundred seventy-three thousand, two hundred seventy-nine".