51771047 has 4 divisors (see below), whose sum is σ = 51886800. Its totient is φ = 51655296.

The previous prime is 51771043. The next prime is 51771053. The reversal of 51771047 is 74017715.

It is a happy number.

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 51771047 - 2² = 51771043 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 (51771043) 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, 57203 + ... + 58100.

It is an arithmetic number, because the mean of its divisors is an integer number (12971700).

Almost surely, 2^51771047 is an apocalyptic number.

51771047 is a deficient number, since it is larger than the sum of its proper divisors (115753).

51771047 is a wasteful number, since it uses less digits than its factorization.

51771047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115752.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 51771047 is about 7195.2100038845. The cubic root of 51771047 is about 372.7025086877.

The spelling of 51771047 in words is "fifty-one million, seven hundred seventy-one thousand, forty-seven".