51530071 has 16 divisors (see below), whose sum is σ = 57506400. Its totient is φ = 45964800.

The previous prime is 51530057. The next prime is 51530107. The reversal of 51530071 is 17003515.

It is not a de Polignac number, because 51530071 - 2⁹ = 51529559 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 (51534071) 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, 21451 + ... + 23731.

It is an arithmetic number, because the mean of its divisors is an integer number (3594150).

Almost surely, 2^51530071 is an apocalyptic number.

51530071 is a deficient number, since it is larger than the sum of its proper divisors (5976329).

51530071 is a wasteful number, since it uses less digits than its factorization.

51530071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 51530071 is about 7178.4448872998. Note that the first 3 decimals coincide. The cubic root of 51530071 is about 372.1233428236.

Adding to 51530071 its reverse (17003515), we get a palindrome (68533586).

The spelling of 51530071 in words is "fifty-one million, five hundred thirty thousand, seventy-one".