51581741 has 4 divisors (see below), whose sum is σ = 51626172. Its totient is φ = 51537312.

The previous prime is 51581729. The next prime is 51581767. The reversal of 51581741 is 14718515.

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 11195716 + 40386025 = 3346^2 + 6355^2 .

It is a cyclic number.

It is not a de Polignac number, because 51581741 - 2¹⁴ = 51565357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51581698 and 51581707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51511741) 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, 20426 + ... + 22811.

It is an arithmetic number, because the mean of its divisors is an integer number (12906543).

Almost surely, 2^51581741 is an apocalyptic number.

It is an amenable number.

51581741 is a deficient number, since it is larger than the sum of its proper divisors (44431).

51581741 is a wasteful number, since it uses less digits than its factorization.

51581741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44430.

The product of its digits is 5600, while the sum is 32.

The square root of 51581741 is about 7182.0429544803. The cubic root of 51581741 is about 372.2476792206.

The spelling of 51581741 in words is "fifty-one million, five hundred eighty-one thousand, seven hundred forty-one".