51145071 has 16 divisors (see below), whose sum is σ = 71897088. Its totient is φ = 32292000.

The previous prime is 51145057. The next prime is 51145079. The reversal of 51145071 is 17054115.

It is not a de Polignac number, because 51145071 - 2²¹ = 49047919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1480 + ... + 10221.

It is an arithmetic number, because the mean of its divisors is an integer number (4493568).

Almost surely, 2^51145071 is an apocalyptic number.

51145071 is a deficient number, since it is larger than the sum of its proper divisors (20752017).

51145071 is a wasteful number, since it uses less digits than its factorization.

51145071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11782.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 51145071 is about 7151.5782174287. The cubic root of 51145071 is about 371.1942686353.

Adding to 51145071 its reverse (17054115), we get a palindrome (68199186).

The spelling of 51145071 in words is "fifty-one million, one hundred forty-five thousand, seventy-one".