51224727 has 4 divisors (see below), whose sum is σ = 68299640. Its totient is φ = 34149816.

The previous prime is 51224713. The next prime is 51224731. The reversal of 51224727 is 72742215.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51224727 - 2⁷ = 51224599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51224694 and 51224703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224707) 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, 8537452 + ... + 8537457.

It is an arithmetic number, because the mean of its divisors is an integer number (17074910).

Almost surely, 2^51224727 is an apocalyptic number.

51224727 is a deficient number, since it is larger than the sum of its proper divisors (17074913).

51224727 is a wasteful number, since it uses less digits than its factorization.

51224727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17074912.

The product of its digits is 7840, while the sum is 30.

The square root of 51224727 is about 7157.1451710860. The cubic root of 51224727 is about 371.3868744471.

The spelling of 51224727 in words is "fifty-one million, two hundred twenty-four thousand, seven hundred twenty-seven".