51771061 has 4 divisors (see below), whose sum is σ = 53556300. Its totient is φ = 49985824.

The previous prime is 51771059. The next prime is 51771073. The reversal of 51771061 is 16017715.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39450961 + 12320100 = 6281^2 + 3510^2 .

It is a cyclic number.

It is not a de Polignac number, because 51771061 - 2¹ = 51771059 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 (51771361) 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, 892576 + ... + 892633.

It is an arithmetic number, because the mean of its divisors is an integer number (13389075).

Almost surely, 2^51771061 is an apocalyptic number.

It is an amenable number.

51771061 is a deficient number, since it is larger than the sum of its proper divisors (1785239).

51771061 is a wasteful number, since it uses less digits than its factorization.

51771061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785238.

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 51771061 is about 7195.2109767539. The cubic root of 51771061 is about 372.7025422832.

Adding to 51771061 its reverse (16017715), we get a palindrome (67788776).

The spelling of 51771061 in words is "fifty-one million, seven hundred seventy-one thousand, sixty-one".