51772447 has 4 divisors (see below), whose sum is σ = 51899440. Its totient is φ = 51645456.

The previous prime is 51772423. The next prime is 51772451. The reversal of 51772447 is 74427715.

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

It is a cyclic number.

It is not a de Polignac number, because 51772447 - 2⁷ = 51772319 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 (51772247) 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, 62883 + ... + 63700.

It is an arithmetic number, because the mean of its divisors is an integer number (12974860).

Almost surely, 2^51772447 is an apocalyptic number.

51772447 is a deficient number, since it is larger than the sum of its proper divisors (126993).

51772447 is a wasteful number, since it uses less digits than its factorization.

51772447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126992.

The product of its digits is 54880, while the sum is 37.

The square root of 51772447 is about 7195.3072901718. The cubic root of 51772447 is about 372.7058682154.

The spelling of 51772447 in words is "fifty-one million, seven hundred seventy-two thousand, four hundred forty-seven".